Journal articles: 'Oilseed rape'

1

Scarisbrick, D. H., L. Atkinson, and E. Asare. "Oilseed Rape." Outlook on Agriculture 18, no. 4 (December 1989): 152–59. http://dx.doi.org/10.1177/003072708901800403.

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Although oilseed rape has been grown in Europe since the 16th century it is only since the 1960s, as part of a policy of self-sufficiency in vegetable oils, that it has become a major crop. Apart from the intrinsic problems of crop management and the control of pests and diseases, growers have had to face others arising from EEC regulations concerning the composition of the oil and price support policies often conceived without proper understanding of the requirements of the crop.

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Kirk, William. "Oilseed rape (swede rape)." Bee World 77, no. 3 (January 1996): 138–40. http://dx.doi.org/10.1080/0005772x.1996.11099305.

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Chen, Siyu, Da Yang, Yufei Wei, Lizhen He, Zujian Li, and Shangdong Yang. "Changes in Soil Phosphorus Availability and Microbial Community Structures in Rhizospheres of Oilseed Rapes Induced by Intercropping with White Lupins." Microorganisms 11, no. 2 (January 28, 2023): 326. http://dx.doi.org/10.3390/microorganisms11020326.

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Oilseed rape is sensitive to soil phosphorus deficiencies. In contrast, white lupin is widely used as a model plant because it has efficient phosphorus utilization. Therefore, soil fertility and microbial composition in the rhizospheres of oilseed rapes and root exudate metabolites were compared under monocropping and intercropping systems. The main purpose was to explore whether the phosphorus absorption of rapeseed can be promoted by intercropping with white lupine. In comparison with oilseed rape monoculture (RR), the results showed that the contents of soil-available phosphorus, microbial biomass and phosphorus in the rhizospheres of oilseed rapes in the intercropping system (RL) were all higher than those of RR. Meanwhile, in comparison with RR, not only phosphorus-solubilizing bacteria, such as Streptomyces, Actinomadura and Bacillus, but also phosphorus-solubilizing fungi, such as Chaetomium, Aspergillus, Penicillium, were enriched in the rhizospheres of the oilseed rape under the RL system. Moreover, more abundant soil bacterial functions, organic acids and metabolites were also detected in root exudates of the oilseed rapes under the RL system. All of the above results suggest that soil phosphorus availability in the rhizospheres of oilseed rape could be improved by intercropping with white lupin. Additionally, soil phosphorus-solubilizing microorganisms, that are enriched in the rhizospheres of oilseed rapes under RL systems, have an important function in the improvement of phosphorus absorption of rapeseed by intercropping with white lupin.

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Hrudová, Eva, Marek Seidenglanz, Pavel Tóth, Jana Poslušná, Pavel Kolařík, and Jiří Havel. "Pollen Beetles in Oilseed Rape Fields: Spectrum and Distribution in Czech Republic during 2011–2013." Agriculture 13, no. 6 (June 14, 2023): 1243. http://dx.doi.org/10.3390/agriculture13061243.

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Oilseed rape is frequently damaged by insect pests. Much attention is paid to the protection of oilseed rape against Brassicogethes aeneus (Coleoptera: Nitidulidae), which is one of the most significant pests of spring and winter oilseed rape. The presence of different pollen beetle species was monitored in the Czech Republic in the years 2011–2013. A minimum of 500 individuals were captured at each site. Morphometric characteristics and the morphology of male and/or female genitalia were used to determine species. B. aeneus, B. subaeneus, B. viridescens and B. coracinus were most abundant. Other species presented in oilseed rape were B. coeruleovirens, B. czwalinai, B. matronalis, B. anthracinus, Boragogethes symphyti, Cychramus luteus, Fabogethes nigrescens, Genistogethes carinulatus, Meligethes atratus, Sagitogethes maurus, and Lamiogethes atramentarius. Our main conclusion is that the reason for the presence of the pollen beetle species associated with their development into non-cruciferous plants in oilseeds is the sufficiency of pollen as food for beetles. In addition, they may occur here incidentally, as they can be transported relatively long distances by air. Accompanying species of pollen beetles probably also have a positive effect on abundance reduction in species considered to be harmful as they are hosts to parasitoids of the oilseed rape pest.

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MANDEEP KAUR, VIRENDER SARDANA, and PUSHP SHARMA. "Performance of canola oilseed rape (Brassica napus), Ethiopian mustard (Brassica carinata) and Indian rape (Brassica rapa) in the intercropping system." Indian Journal of Agronomy 62, no. 2 (October 10, 2001): 211–14. http://dx.doi.org/10.59797/ija.v62i2.4283.

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A field experiment was conducted at Ludhiana, Punjab, during the winter (rabi) season of 201415, to study the production potential of Indian rape (Brassica rapa var. toria), oilseed rape (Brassica napus L.) and Ethiopian mus- tard (Brassica carinata A. Braun) in different row spacings and row proportions in the intercropping systems. The experiment comprised 14 treatments which were replicated thrice as per randomized complete-block design. Plant height at maturity and dry-matter accumulation (DMA) at 90 days after sowing by component crops decreased sig- nificantly in intercropping as compared to their sole crops and such reduction in plant height was more for the nar- row row spacing, and for DMA with increasing row spacing. Number of siliquae/plant and 1,000- seed weight of In- dian rape and Ethiopian mustard, and number of seeds/siliqua of Ethiopian mustard were not influenced by the in- tercropping. The highest seed yield given by Indian rape (1.16 t/ha) in Ethiopian mustard + Indian rape intercrop- ping system (1:2, 22.5 cm) was 80.5% of its sole crop yield. Seed yield of non-canola oilseed rape when inter- cropped with Indian rape (1:1, 22.5 cm) was 45.7% lower than its sole crop yield (1.85 t/ha). However, oilseed rape-equivalent yield produced by non-canola oilseed rape + Indian rape (1 : 1, 22.5 cm) was 22.9% higher than sole non canola oilseed rape. Similarly, sole crop of canola oilseed rape (1.63 t/ha) gave 91.0, 60.2 and 35.3% higher seed yield than its yield under intercropping with Indian rape in different row proportions and spacing. Oil- seed rape- equivalent yield in the canola oilseed rape + Indian rape sown in 1 : 1 and 2 : 1 row proportion at 22.5 cm row spacing was 16.9 and 20.1% higher than sole canola oilseed rape (1.63 t/ha). Similar to seed yields, sto- ver yields of component crops were significantly decreased in the intercropping system (ICS). Canola/ non-canola oilseed rape based intercropping system (ICS) resulted in higher net returns than sole crops, whereas Ethiopian mustard sown as sole crop was more remunerative than its intercropping with Indian rape.

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6

Koprna, R. "Winter Oilseed Rape Oponent." Czech Journal of Genetics and Plant Breeding 42, No. 3 (November 21, 2011): 115–16. http://dx.doi.org/10.17221/6060-cjgpb.

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7

Macháčková, I. "Winter oilseed rape Aplaus." Czech Journal of Genetics and Plant Breeding 43, No. 1 (January 7, 2008): 33–34. http://dx.doi.org/10.17221/1902-cjgpb.

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Koprna, R. "Winter oilseed rape Oksana." Czech Journal of Genetics and Plant Breeding 43, No. 2 (January 7, 2008): 71–72. http://dx.doi.org/10.17221/1907-cjgpb.

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9

Koprna, R. "Winter oilseed rape Opus." Czech Journal of Genetics and Plant Breeding 43, No. 2 (January 7, 2008): 69–70. http://dx.doi.org/10.17221/1908-cjgpb.

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10

Neshev, Nesho. "Preceding crop influences on the development and yields of the winter oilseed rape (Brassica napus L.)." Agricultural Sciences 14, no. 32 (March 18, 2022): 56–62. http://dx.doi.org/10.22620/agrisci.2022.32.009.

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The evidence about the influence of the preceding crops on the oilseed rape growth and development is scarce. Therefore, a study in three vegetation seasons of the winter oilseed rape (2017/2018, 2018/2019, and 2019/2020) was conducted. The experiment was situated in the experimental field of the department of „Agriculture and herbology” at the Agricultural University of Plovdiv, Bulgaria. The experiment was conducted by the long plots method. The following crop rotations were under evaluation: 1. Winter wheat – winter oilseed rape; 2. Winter oilseed rape – winter oilseed rape; 3. Maize – winter oilseed rape. All evaluated parameters of the winter oilseed rape as plant height at the end of vegetation, number of primary branches and silique plant-1, seed yield, absolute mass of 1000 seeds, hectoliter seed mass as well as seed oil content were influenced by the preceding crop. The highest results of the studied indicators for the rotation of winter wheat – winter oilseed rape were recorded. The lowest obtained results for the rotation maize – winter oilseed rape were found, and medium results were accomplished for the oilseed rape monoculture.

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11

McSharry, C. "Oilseed rape sensitivity." Clinical & Experimental Allergy 27, no. 2 (February 1997): 125–27. http://dx.doi.org/10.1111/j.1365-2222.1997.tb00683.x.

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12

McSHARRY, C. "Oilseed rape sensitivity." Clinical Experimental Allergy 27, no. 2 (February 1997): 125–27. http://dx.doi.org/10.1046/j.1365-2222.1997.d01-494.x.

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13

Ekuere, U. U., I. A. P. Parkin, C. Bowman, D. Marshall, and D. J. Lydiate. "Latent S alleles are widespread in cultivated self-compatible Brassica napus." Genome 47, no. 2 (April 1, 2004): 257–65. http://dx.doi.org/10.1139/g03-120.

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The genetic control of self-incompatibility in Brassica napus was investigated using crosses between resynthesized lines of B. napus and cultivars of oilseed rape. These crosses introduced eight C-genome S alleles from Brassica oleracea (S16, S22, S23, S25, S29, S35, S60, and S63) and one A-genome S allele from Brassica rapa (SRM29) into winter oilseed rape. The inheritance of S alleles was monitored using genetic markers and S phenotypes were determined in the F1, F2, first backcross (B1), and testcross (T1) generations. Two different F1 hybrids were used to develop populations of doubled haploid lines that were subjected to genetic mapping and scored for S phenotype. These investigations identified a latent S allele in at least two oilseed rape cultivars and indicated that the S phenotype of these latent alleles was masked by a suppressor system common to oilseed rape. These latent S alleles may be widespread in oilseed rape varieties and are possibly associated with the highly conserved C-genome S locus of these crop types. Segregation for S phenotype in subpopulations uniform for S genotype suggests the existence of suppressor loci that influenced the expression of the S phenotype. These suppressor loci were not linked to the S loci and possessed suppressing alleles in oilseed rape and non-suppressing alleles in the diploid parents of resynthesized B. napus lines.Key words: self-incompatibility, B. oleracea, B. rapa, S locus, suppression.

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14

Dobosz, Renata, and Stefan Kornobis. "Population Dynamics of Sugar-Beet Cyst Nematode (Heterodera Schachtii) On Spring and Winter Oilseed Rape Crops." Journal of Plant Protection Research 48, no. 2 (June 1, 2008): 237–45. http://dx.doi.org/10.2478/v10045-008-0027-4.

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Population Dynamics of Sugar-Beet Cyst Nematode (Heterodera Schachtii) On Spring and Winter Oilseed Rape Crops The influence of spring as well as winter oilseed rape on the change in population density of H. schachtii was investigated in microplot experiment in the years 2002-2005. The spring oilseed rape caused the increase of nematode population (Pf/Pi were 1.31-1.79), in contrast to winter oilseed rape where the population distinctly decreased (Pf/Pi were 0.49-0.59). No statistically important differences between winter oilseed rape crops and fallow were observed. Comparative observations of the life cycle were carried out in pot experiments outdoors. On spring oilseed rape only one generation was completed. The development of the second generation was interrupted because of crop harvesting. In winter oilseed rape J3 and J4 occurred in roots in the autumn where they probably did not over-winter, except of the years 2006-2007. In the spring there was a second emergence of larvae and adult females were observed in June and July. The development of the second generation was interrupted because of harvesting. In winter oilseed rape sown in the spring one generation was completed.

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15

Scarisbrick, D. H. "Book Review: Oilseed Rape." Outlook on Agriculture 15, no. 1 (March 1986): 48. http://dx.doi.org/10.1177/003072708601500118.

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16

Vujaković, Milka, Ana Marjanović-Jeromela, Jelena Ovuka, Dušica Jovičić, and Jasna Savić. "Oilseed rape seed aging." Journal on Processing and Energy in Agriculture 23, no. 2 (2019): 55–57. http://dx.doi.org/10.5937/jpea1902055v.

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17

Kucharski, Mariusz, and Jerzy Sadowski. "Metazachlor residues in soil and rape seed." Journal of Plant Protection Research 54, no. 1 (January 1, 2014): 74–77. http://dx.doi.org/10.2478/jppr-2014-0011.

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Abstract The purpose of the work was to analyse metazachlor contamination of the soil and metazachlor contamination of rape seeds. Monitoring tests were carried out during the 2010-2012 time period, on winter and spring oilseed rape fields located in south-western Poland. Soil and seed samples were collected at harvest time. The determination of metazachlor residues was conducted using gas chromatography with electron capture detection (GC/ECD). Based on the analysis of a total of 59 soil samples and 59 rape seed samples, metazachlor residue was detected in 45% of the soil samples of winter oilseed rape and in 71% of the soil samples of spring oilseed rape. Metazachlor contamination of rape seed was detected in 29% of winter rape samples and in 53% of spring rape samples. The concentration of assayed residue did not exceed 0.0005-0.0102 mg/kg. There were significantly higher amounts of metazachlor residue determined for the soil and seed samples of spring oilseed rape. None of the analyzed samples of oilseed rape seed showed a residue content exceeding the Maximum Residue Level (MRL).

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18

Guan, Zheng-Jun, Min Zheng, Zhi-Xi Tang, Wei Wei, and C. Neal Stewart. "Proteomic Analysis of Bt cry1Ac Transgenic Oilseed Rape (Brassica napus L.)." Plants 12, no. 12 (June 15, 2023): 2319. http://dx.doi.org/10.3390/plants12122319.

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Oilseed rape (Brassica napus L.) is an important cash crop, but transgenic oilseed rape has not been grown on a commercial scale in China. It is necessary to analyze the characteristics of transgenic oilseed rape before commercial cultivation. In our study, differential expression of total protein from the leaves in two transgenic lines of oilseed rape expressing foreign Bt Cry1Ac insecticidal toxin and their non-transgenic parent plant was analyzed using a proteomic approach. Only shared changes in both of the two transgenic lines were calculated. Fourteen differential protein spots were analyzed and identified, namely, eleven upregulated expressed protein spots and three downregulated protein spots. These proteins are involved in photosynthesis, transporter function, metabolism, protein synthesis, and cell growth and differentiation. The changes of these protein spots in transgenic oilseed rape may be attributable to the insertion of the foreign transgenes. However, the transgenic manipulation might not necessarily cause significant change in proteomes of the oilseed rape.

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ROQUES, S. E., and P. M. BERRY. "The yield response of oilseed rape to plant population density." Journal of Agricultural Science 154, no. 2 (January 20, 2015): 305–20. http://dx.doi.org/10.1017/s0021859614001373.

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SUMMARYEight winter oilseed rape and two spring oilseed rape field experiments were performed in the UK in harvest years 2009–12. Each experiment consisted of at least one hybrid and one open-pollinated variety grown at five seed rates from 10 or 20 seeds/m2 to 160 or 200 seeds/m2. Linear plus exponential curves were used to describe the yield response to seed rate and to calculate economically optimal seed rates. Plant counts were then used to derive optimal plant population densities. These ranged from <10 to 39 plants/m2 for six winter oilseed rape experiments between 73 and >155 plants/m2 in two winter oilseed rape experiments with severe spring droughts, and from 47 to 65 plants/m2 for spring oilseed rape. Optimal plant population densities were lower for hybrid than for open-pollinated varieties, due to a combination of the higher cost of hybrid seed and, for some experimental sites, hybrid varieties compensating better for low plant populations. Across all sites, sowing winter oilseed rape at 30 seeds/m2 rather than common commercial rates of 70 seeds/m2 for hybrids and 100 seeds/m2 for open-pollinated varieties would have increased average gross margin by £29/ha. Sowing spring oilseed rape at 70 seeds/m2 rather than commonly used rates of 120 or 150 seeds/m2 would have increased average gross margin by £64/ha.

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Zheng, Xiaorong, Annette Pfordt, Laxman Khatri, Alice Bisola Eseola, Antonia Wilch, Birger Koopmann, and Andreas von Tiedemann. "Contrasting Patterns of Colonization with Verticillium longisporum in Winter- and Spring-Type Oilseed Rape (Brassica napus) in the Field and Greenhouse and the Role of Soil Temperature." Plant Disease 103, no. 8 (August 2019): 2090–99. http://dx.doi.org/10.1094/pdis-01-19-0236-re.

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Oilseed rape, an important source of vegetable plant oil, is threatened by Verticillium longisporum, a soil-borne vascular fungal pathogen so far occurring in oilseed rape growing regions in Europe and Canada. Despite intensive research into V. longisporum in the last decades in controlled conditions, basic knowledge is still lacking about the time course of infection, temporal pattern of colonization, and disease development on field-grown plants. In this study, colonization of roots, stem bases, and stems with V. longisporum was followed by real-time PCR from the seedling until mature plant stages in 2-year field experiments with microsclerotia-infested plots and either spring-type or autumn-sown (winter-type) oilseed rape cultivars. The temporal pattern of plant colonization differed between greenhouse and field-grown oilseed rape and between spring- and winter-type plants in the field. Within 28 to 35 days, a continuous systemic colonization with V. longisporum was detected in roots and shoots of young plants in the greenhouse associated with significant stunting. In contrast, real-time PCR analysis of V. longisporum in field-grown winter oilseed rape plants displayed a strongly discontinuous colonization pattern with low fungal growth in roots during juvenile growth stages until flowering, whereas in spring oilseed rape, no root colonization was observed until early flowering stages. Hence, stem colonization with the pathogen required 6 months in winter oilseed rape and 1 month in spring oilseed rape from the time of initial root infection. The different patterns of stem colonization were related to soil temperature. Average soil temperatures in 5-cm depth during 7 days before sampling time points from 2 years of field experiments displayed a significant relationship with fungal colonization in the root. A climate chamber inoculation trial with soil temperature levels that varied from 6 to 18°C revealed a threshold temperature of >12°C in the soil to enable root invasion. This soil condition is reached in winter-type oilseed rape in the field in Germany either until the eight-leaf stage in early autumn or after pod stage in spring, whereas in spring-sown oilseed rape early root infection is delayed owing to the cool conditions during juvenile growth stages. The delay of stem colonization in field-grown oilseed rape may explain the lack of stunting as observed in the greenhouse and the previously reported inconsistent effects of V. longisporum on yield levels and seed quality, which were confirmed in this study.

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Durstewitz, G., A. Polley, J. Plieske, H. Luerssen, E. M. Graner, R. Wieseke, and M. W. Ganal. "SNP discovery by amplicon sequencing and multiplex SNP genotyping in the allopolyploid species Brassica napusThis article is one of a selection of papers from the conference “Exploiting Genome-wide Association in Oilseed Brassicas: a model for genetic improvement of major OECD crops for sustainable farming”." Genome 53, no. 11 (November 2010): 948–56. http://dx.doi.org/10.1139/g10-079.

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Oilseed rape ( Brassica napus ) is an allotetraploid species consisting of two genomes, derived from B. rapa (A genome) and B. oleracea (C genome). The presence of these two genomes makes single nucleotide polymorphism (SNP) marker identification and SNP analysis more challenging than in diploid species, as for a given locus usually two versions of a DNA sequence (based on the two ancestral genomes) have to be analyzed simultaneously during SNP identification and analysis. One hundred amplicons derived from expressed sequence tag (ESTs) were analyzed to identify SNPs in a panel of oilseed rape varieties and within two sister species representing the ancestral genomes. A total of 604 SNPs were identified, averaging one SNP in every 42 bp. It was possible to clearly discriminate SNPs that are polymorphic between different plant varieties from SNPs differentiating the two ancestral genomes. To validate the identified SNPs for their use in genetic analysis, we have developed Illumina GoldenGate assays for some of the identified SNPs. Through the analysis of a number of oilseed rape varieties and mapping populations with GoldenGate assays, we were able to identify a number of different segregation patterns in allotetraploid oilseed rape. The majority of the identified SNP markers can be readily used for genetic mapping, showing that amplicon sequencing and Illumina GoldenGate assays can be used to reliably identify SNP markers in tetraploid oilseed rape and to convert them into successful SNP assays that can be used for genetic analysis.

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Lemesh, V. A., M. Bahdanava, G. Mozgova, and A. Burakova. "Polymorphism of microsatellite loci in feral populations and commercial varieties of oilseed rape (Brassica napus L.)." Faktori eksperimental'noi evolucii organizmiv 25 (August 30, 2019): 67–73. http://dx.doi.org/10.7124/feeo.v25.1141.

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Aim. The aim of the work was to compare the polymorphism of commercial varieties and populations of B. napus growing outside cultivation to assess the genetic diversity of feral rapeseed populations in Belarus. Methods. The study assessed genetic diversity according to the data of 7 microsatellite loci genotyping. Results. The results indicate a greater genetic diversity in feral oilseed rape populations. An analysis of the structure of the genotypes distribution in the STRUCTURE software showed the division into three clusters – commertial varieties, feral populations and samples of B. rapa. Conclusions. The established genetic divergence between feral populations and commercial varieties indicates that feral oilseed rape is able to maintain persistent populations in Belarus. In practice, this should be taken into account when assessing the environmental risk when transgenic rape is released into the environment. And in the cultivation of transgenic rapeseed, special attention should be paid to measures to prevent the occurrence of its free-growing populations. Keywords: oilseed rape, feral populations, microsatellite loci, genetic diversity.

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Heard, M. S., C. Hawes, G. T. Champion, S. J. Clark, L. G. Firbank, A. J. Haughton, A. M. Parish, et al. "Weeds in fields with contrasting conventional and genetically modified herbicide–tolerant crops. II. Effects on individual species." Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences 358, no. 1439 (October 16, 2003): 1833–46. http://dx.doi.org/10.1098/rstb.2003.1401.

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We compared the effects of the management of genetically modified herbicide–tolerant (GMHT) and conventional beet, maize and spring oilseed rape on 12 weed species. We sampled the seedbank before and after cropping. During the season we counted plants and measured seed rain and biomass. Ratios of densities were used to calculate emergence, survival, reproduction and seedbank change. Treatments significantly affected the biomass of six species in beet, eight in maize and five in spring oilseed rape. The effects were generally consistent, with biomass lower in GMHT beet and spring oilseed rape and higher in GMHT maize. With few exceptions, emergence was higher in GMHT crops. Subsequent survival was significantly lowered for eight species in beet and six in spring oilseed rape in the GMHT treatments. It was increased for five species in maize and one in spring oilseed rape. Significant effects on seedbank change were found for four species. However, for many species in beet and spring oilseed rape (19 out of 24 cases), seed densities were lower in the seedbank after GMHT cropping. These differences compounded over time would result in large decreases in population densities of arable weeds. In maize, populations may increase.

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HAUKKAPÄÄ, A.-L., S. JUNNILA, and C. ERIKSSON. "Efficacy of imazamox in imidazolinone-resistant spring oilseed rape in Finland." Agricultural and Food Science 14, no. 4 (December 4, 2008): 377. http://dx.doi.org/10.2137/145960605775897650.

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Imidazolinonies (IMIs) are a group of herbicides inhibiting acetolactate synthase (ALS) activity. They control the growth of many broadleaved weeds and annual grass species. Herbicide resistance against imidazolinonies has been transferred in some crop species, for example in Brassica napus. IMI-resistant oilseed rape cultivars have been developed by a mutation in ALS. They have been on the market for a few years, especially in North America. To determine if imazamox, an imidazolinone herbicide, and IMI-resistant oilseed rape cultivars are suitable for cultivation in Finland, we conducted four herbicide trials in three locations. We found, that imazamox had no negative effect on yield or oil quality characters of IMI-resistant oilseed rape. Some transient chlorosis was observed immediately after the treatment, but it was not apparent after a few days. The effects of imazamox against the most troublesome weeds in oilseed field in Finland, Chenopodium album and Galium spurium, were very good. Imazamox had good or moderate effects on Stellaria media, whereas its effects on Viola arvensis, Lapsana communis and Fallopia convolvulus were insufficient. If the total weed number was high or the emergence of oilseed rape was slow, the application of imazamox increased the yield of oilseed rape compared to untreated control. Our results suggest that imazamox is a good alternative in controlling weeds for Finnish oilseed fields. Therefore, it would be beneficial to transfer the IMI-resistance into Finnish oilseed and turnip rape lines.;

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Mintāle, Zane, and Māra Vikmane. "Changes of Photosynthesis-Related Parameters and Productivity of Spring Oilseed Rape under Different Nitrogen and Sulphur Fertilizers Supply." Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 1 (August 6, 2015): 163. http://dx.doi.org/10.17770/etr2013vol1.816.

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Fertilization with essential mineral elements is important to get high quality yield results. The lack of necessary mineral elements in soil can affect oilseed rape plant physiological functions, photosynthesis and plant productivity. Oilseed rape plants have high requirements for nitrogen and as oil crop – for sulphur. The aim of the investigation was to explain changes of chlorophyll a fluorescence parameters in spring oilseed rape leaves and yield changes under nitrogen and sulphur supply. During laboratory experiments changes of chlorophyll a fluorescence parameters and during field experiments changes of yield parameters under different nitrogen and sulphur supply were observed. Laboratory and field experiments showed that sulphur fertilizer rate 18 kg ha-1 is the most effective sulphur dose for spring oilseed rape, when nitrogen 55 kg ha-1 is added, because its presence has positive effect on photosynthetic reactions. There was found out in laboratory experiments that chlorophyll a fluorescence parameters Fv/Fm and PI can be used to describe sulphur and nitrogen mineral element supply efficacy on spring oilseed rape. There was observed in the field experiment that oilseed rape yield increases significantly (from +0.34 t ha-1 to +0.64 t ha-1) under optimal (S18N55) nutrient supply, but lack of sulphur leads to significant yield losses. To avoid excessive fertilizer usage, its negative impact on plant physiology and yield losses, we consider that sulphur: nitrogen = 1:3 as additional fertilizer is optimal for spring oilseed rape plants.

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Kondić, Danijela, Đurađ Hajder, Saša Marinković, and Miloš Nožinić. "Winter Oilseed Rape (Brassica napus L.) Yield Components in Agro–ecological Conditions of Banja Luka Region." АГРОЗНАЊЕ 18, no. 3 (January 12, 2018): 175. http://dx.doi.org/10.7251/agren1703175k.

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Due to its numerous agricultural and industrial purposes, oilseed rape is a very important species. The total production of oilseed rape in the Republic of Srpska is faced with noticeable variation throughout years, with an increase in last three years. The oilseed rape yield is strongly influenced by environmental factors. The objective of this study was to analyze yield components of oilseed rape in agro–ecological conditions of Banja Luka. Four oilseed rape hybrids were used: PR46W21, PR46W20, PR46W14 and PR45DO3 in two growing seasons: 2012/13 and 2013/14. Yield components tested were: pod mass (g), seed mass per pod (g), pod index (%), number of seeds per pod and 1000–seed weight (g). Factorial 2×4 ANOVA and Fisher's LSD test were used to analyze data, with growing seasons (years) and hybrids as factors. Growing season significantly affected the pod mass (g), total seed mass per pod (g) and 1000–seed weight. Generally, higher yield component values were obtained in the second examined year (2013/14).

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Zhu, Jinwen, Wen Liang, Siyu Yang, Huifu Wang, Chunhua Shi, Shuo Wang, Weijun Zhou, et al. "Safety of Oilseed Rape Straw Mulch of Different Lengths to Rice and Its Suppressive Effects on Weeds." Agronomy 10, no. 2 (February 1, 2020): 201. http://dx.doi.org/10.3390/agronomy10020201.

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Rice is widely grown after harvesting of oilseed rape (Brassica napus L.) in many countries. Experiments were carried out under greenhouse and field conditions to assess the impact of oilseed rape straw mulch on rice and paddy weeds. Oilseed rape mulch (900 g m−2) from straw 1-to-7 cm long was found to be safe for rice, when applied four days after sowing (DAS) in direct-seeded rice or four days after transplanting (DAT). In the meantime, the biomass of Echinochloa crus-galli (L.) P. Beauv. was reduced 65.74%, 80.18%, 81.15%, 70.99%, 55.65%, and 27.22%, respectively, when mulched with powder, and 1, 3, 5, 7, and 9-cm long oilseed rape straw, respectively, and the biomass reductions in Leptochloa chinensis (L.) Nees., Ludwigia prostrata Roxb., Ammannia auriculata Willd., and Cyperus difformis L. were all above 97% when mulched with 1 cm-length straw. The results of a field trial confirmed that oilseed rape straw mulch (900 g m−2) of 1 cm length was safe for rice. Moreover, weed suppression was as effective as the standard herbicide (oxadiargyl + butachlor 525 g ai ha−1) treatment. These findings demonstrate the potential to manage paddy rice weeds in an effective and environmentally sound manner by mulching with the straw of a preceding crop, oilseed rape.

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LIU, F. X., C. P. BU, T. TANG, G. M. CHEN, S. K. GU, Y. N. WANG, and X. X. ZHAO. "Effects of Chinese honeybee foraging on oilseed rape gene flow and honey ingredients." Journal of Agricultural Science 155, no. 10 (November 16, 2017): 1623–32. http://dx.doi.org/10.1017/s0021859617000776.

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SUMMARYHoneybee foraging can transfer exogenous genes from genetically modified (GM) oilseed rape (Brassica napusL.) to closely related plants, which not only induces potential ecological risks but also contaminates non-GM seeds or honey products with GM ingredients. These events may lead to international trade disputes. Chinese honeybees (Apis cerana ceranaFabricius) and a herbicide (glufosinate)-resistant GM strain ofB. napus(Z7B10) were studied to examine the effects of honeybee short-range foraging on oilseed rape gene flow and honey ingredients. Results showed variable frequencies of gene flow between GM and non-GM oilseed rape cultivars, with the highest frequency under nylon net isolation with artificially stocked honeybees, the lowest frequency under nylon net isolation alone, and an intermediate frequency under natural pollination, suggesting the important role of honeybee foraging in gene flow frequency. Additionally, GM pollen grains were found in honey collected from honeybees foraging on both GM and non-GM oilseed rape cultivars. The phosphinothricin acetyltransferase protein was also detected in both unbroken pollen-containing and pollen-free honey by protein testing strips, suggesting that honeybee foraging on GM oilseed rape could lead to contamination with GM ingredients. Overall, the results provide a direct scientific basis for the ecological risk assessment and safety management of GM oilseed rape.

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McVetty, P. B. E., R. Scarth, and S. R. Rimmer. "295 BX summer oilseed rape." Canadian Journal of Plant Science 81, no. 1 (January 1, 2001): 97–99. http://dx.doi.org/10.4141/p00-084.

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295 BX is the second in the Navigator® series of summer oilseed rape (Brassica napus L.) canola cultivars, which are resistant to Compas®, a mix of herbicides including the broadleaf herbicide bromoxynil. It is 44 kg ha–1 (1.9%) higher yielding than the mean of the checks Cyclone, AC Excel and Legend, is 2 g kg–1 higher than the mean of the checks for oil concentration and is moderately susceptible to blackleg. 295 BX is adapted to the long- and mid-season B. napus canola-growing areas of western Canada. Key words: Oilseed rape (summer), bromoxynil resistance, Navigator® , Compas®

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McVetty, P. B. E., S. R. Rimmer, and R. Scarth. "Armor BX summer oilseed rape." Canadian Journal of Plant Science 81, no. 1 (January 1, 2001): 93–95. http://dx.doi.org/10.4141/p00-085.

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Armor BX is the first in the Navigator® series of summer oilseed rape (Brassica napus L.) canola cultivars, which are resistant to Compas® herbicide, a mix of herbicides including the broadleaf herbicide bromoxynil. It is 60 kg ha–1 (2.5%) higher yielding than the mean of the checks Cyclone, AC Excel and Legend, is 1 g kg–1 higher than the mean of the checks for oil concentration and is moderately resistant to blackleg. Armor BX is adapted to the long- and mid-season B. napus canola-rowing areas of western Canada. Key words: Oilseed rape (summer), bromoxynil resistance, Navigator®, Compas®

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Rimmer, S. R., R. Scarth, and P. B. E. McVetty. "Cartier BX summer oilseed rape." Canadian Journal of Plant Science 81, no. 1 (January 1, 2001): 105–6. http://dx.doi.org/10.4141/p00-086.

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Cartier BX is the fourth in the Navigator® series of summer oilseed rape (Brassica napus L.) canola cultivars, which are resistant to Compas® herbicide, a mix of herbicides including the broadleaf herbicide bromoxynil. It is 32 kg ha–1 (1.3%) higher yielding than the mean of the check cultivars Defender, AC Excel and Legacy, is 5 g kg–1 lower in oil concentration and is 11 g kg–1 higher in protein concentration than the means of the check cultivars, respectively. Cartier BX is moderately resistant to blackleg disease. Cartier BX is adapted to the long- and mid-season B. napus canola-growing areas of western Canada. Key words: Oilseed rape (summer), bromoxynil resistance, Navigator® , Compas®

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McVetty, P. B. E., R. Scarth, and S. R. Rimmer. "Zodiac BX summer oilseed rape." Canadian Journal of Plant Science 81, no. 1 (January 1, 2001): 101–3. http://dx.doi.org/10.4141/p00-087.

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Zodiac BX is the third in the Navigator® series of summer oilseed rape (Brassica napus L.) canola cultivars, which are resistant to Compas® herbicide, a mix of herbicides including the broadleaf herbicide bromoxynil. Zodiac BX is equal in yield and oil content to the mean of the checks, Legend, AC Excel and Cyclone. Zodiac BX is moderately resistant to blackleg disease. Zodiac BX is adapted to the long- and mid-season B. napus canola-growing areas of western Canada. Key words: Oilseed rape (summer), bromoxynil resistance, Navigator® , Compas®

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McVetty, P. B. E., S. R. Rimmer, and R. Scarth. "Renegade BX summer oilseed rape." Canadian Journal of Plant Science 82, no. 2 (April 1, 2002): 435–36. http://dx.doi.org/10.4141/p01-135.

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Renegade BX is the fifth cultivar in the Navigator® series of summer oilseed rape (Brassica napus L.) canola cultivars. These cultivars are resistant to Compas® herbicide, a mix of herbicides including the broadleaf herbicide bromoxynil. Renegade BX is 380 kg ha-1 (13.6%) higher yielding, 8 g kg-1 higher in oil concentration and equal in protein concentration to the means of the check cultivars Defender, AC Excel and Legacy. Renegade BX is moderately resistant to blackleg disease. Renegade BX is adapted to the long- and mid-season B. napus canola growing areas of western Canada. Key words: Oilseed rape (summer), bromoxynil resistance, Navigator®, Compas®

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FELL, P. J., S. SOULSBY, M. M. BLIGHT, and J. BROSTOFF. "Oilseed rape-a new allergen?" Clinical Experimental Allergy 22, no. 4 (April 1992): 501–5. http://dx.doi.org/10.1111/j.1365-2222.1992.tb00154.x.

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Seaton, A., and A. Soutar. "Oilseed rape and seasonal symptoms." Clinical & Experimental Allergy 24, no. 12 (December 1994): 1089–90. http://dx.doi.org/10.1111/j.1365-2222.1994.tb03311.x.

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Galloway. "Oilseed rape - allergen or irritant?" Clinical & Experimental Allergy 30, no. 3 (March 2000): 308–9. http://dx.doi.org/10.1046/j.1365-2222.2000.00844.x.

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Soutar, A., C. Harker, A. Seaton, and G. Packe. "Oilseed rape and bronchial reactivity." Occupational and Environmental Medicine 52, no. 9 (September 1, 1995): 575–80. http://dx.doi.org/10.1136/oem.52.9.575.

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Metzger, Chase W. "Biocontrol of Oilseed Rape Pests." Journal of Economic Entomology 97, no. 5 (October 2004): 1772. http://dx.doi.org/10.1603/0022-0493-97.5.1772.

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Fredshavn, Jesper R., Gitte S. Poulsen, Inge Huybrechts, and Patrick Rudelsheim. "Competitiveness of transgenic oilseed rape." Transgenic Research 4, no. 2 (March 1995): 142–48. http://dx.doi.org/10.1007/bf01969416.

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Zhang, Wangfei, Yongxin Zhang, Yue Yang, and Erxue Chen. "Oilseed Rape (Brassica napus L.) Phenology Estimation by Averaged Stokes-Related Parameters." Remote Sensing 13, no. 14 (July 6, 2021): 2652. http://dx.doi.org/10.3390/rs13142652.

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Accurate and timely knowledge of crop phenology assists in planning and/or triggering appropriate farming activities. The multiple Polarimetric Synthetic Aperture Radar (PolSAR) technique shows great potential in crop phenology retrieval for its characterizations, such as short revisit time, all-weather monitoring and sensitivity to vegetation structure. This study aims to explore the potential of averaged Stokes-related parameters derived from multiple PolSAR data in oilseed rape phenology identification. In this study, the averaged Stokes-related parameters were first computed by two different wave polarimetric states. Then, the two groups of averaged Stokes-related parameters were generated and applied for analyzing averaged Stokes-related parameter sensitivity to oilseed rape phenology changes. At last, decision tree (DT) algorithms trained using 60% of the data were used for oilseed rape phenological stage classification. Four Stokes parameters (g0, g1, g2 and g3) and eight sub parameters (degree of polarization m, entropy H, ellipticity angle χ, orientation angle φ, degree of linear polarization Dolp, degree of circular polarization Docp, linear polarization ratio Lpr and circular polarization ratio Cpr) were extracted from a multi-temporal RADARSAT-2 dataset acquired during the whole oilseed rape growth cycle in 2013. Their sensitivities to oilseed rape phenology were analyzed versus five main rape phenology stages. In two groups (two different wave polarimetric states) of this study, g0, g1, g2, g3, m, H, Dolp and Lpr showed high sensitivity to oilseed rape growth stages while χ, φ, Docp and Cpr showed good performance for phenology classification in previous studies, which were quite noisy during the whole oilseed rape growth circle and showed unobvious sensitivity to the crop’s phenology change. The DT algorithms performed well in oilseed rape phenological stage identification. The results were verified at the parcel level with left 40% of the point dataset. Five phenology intervals of oilseed rape were identified with no more than three parameters by simple but robust decision tree algorithm groups. The identified phenology stages agree well with the ground measurements; the overall identification accuracies were 71.18% and 79.71%, respectively. For each growth stage, the best performance occurred at stage S1 with the accuracy of 95.65% for Group 1 and 94.23% for Group 2, and the worst performance occurred at stage S3 and S5 with the values around 60%. Most of the classification errors may resulted from the indistinguishability of S3 and S5 using Stokes-related parameters.

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Kendall, S. L., K. Storer, and P. M. Berry. "Measuring canopy size and nitrogen content in oilseed rape for variable plant growth regulator and nitrogen fertiliser application." Advances in Animal Biosciences 8, no. 2 (June 1, 2017): 299–302. http://dx.doi.org/10.1017/s2040470017000875.

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Optimising oilseed rape canopy size through correct management is crucial for maximising yield. Plant growth regulators (PGRs) and nitrogen (N) fertiliser are generally applied at a flat rate, however variable applications may be useful for the optimisation of canopy size. The aim of this paper was to understand the potential for spectral reflectance indices to predict green area index (GAI) and crop N content in winter oilseed rape, with specific focus on the Fritzmeier Isaria Crop Sensor. Three large oilseed rape chessboard experiments were set up in 2015 and 2016 in the UK. The results show good correlations between the Isaria indices and both GAI and crop N content, suggesting that the Isaria may be a useful tool for variably applying PGRs and N fertiliser to oilseed rape.

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López-Granados, Francisca, and Peter J. W. Lutman. "Effect of environmental conditions on the dormancy and germination of volunteer oilseed rape seed (Brassica napus)." Weed Science 46, no. 4 (August 1998): 419–23. http://dx.doi.org/10.1017/s0043174500090834.

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The conditions causing the onset of secondary dormancy in seed of winter oilseed rape cultivars Falcon and Libravo were investigated in a series of laboratory experiments to provide practical guidance on how to minimize the persistence of volunteer oilseed rape seed. The germination of recently harvested oilseed rape seed in moist conditions at 12 C was close to 100% in both darkness and under white light. Imbibition in water stress with an osmotic potential (ψ) of −1,500 kPa at 12 C in far-red light (FR) or dark for more than 5 d induced secondary dormancy in both cultivars. Treatment with FR was more effective than darkness at inducing secondary dormancy. Libravo produced more dormant seed than Falcon. Imbibition in FR and absence of water stress (ψ = 0 kPa) decreased germinability especially at the low temperature (6 C). These conditions resulted in 19.4 and 27.2% dormant seed for Libravo and Falcon, respectively. The results suggest that phytochrome is involved in the induction of secondary dormancy in oilseed rape. In practice, much oilseed rape seed is buried by postharvest cultivation in late summer (low hydric conditions) and exposed to water stress and darkness for some time. To avoid soil seed persistence and subsequent volunteer oilseed rape, seed must be retained at the soil surface when there is adequate moisture available. Therefore, incorporation of seed by tillage should be avoided or delayed as long as possible.

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Gourrion, Alice, Clara Simon, Patrick Vallée, Régine Delourme, Sébastien Chatre, and Jean-Éric Dheu. "Enlarging the genetic diversity of winter oilseed rape (WOSR) by crossing with spring oilseed rape (SOSR)." OCL 27 (2020): 16. http://dx.doi.org/10.1051/ocl/2020013.

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From 1970 to nowadays, breeders have improved oilseed rape (Brassica napus) in many ways: creation of double low varieties (free of erucic acid and with a low content in glucosinolates), increase of the seed yield and quality of seeds and improvement of resistance to diseases. All this work helped oilseed rape to become one of the most produced oilseed crop in the world. However, this intensive breeding on quality has reduced the genetic diversity of winter oilseed rape. In this study, a group of four breeding companies (RAGT, Limagrain, Syngenta, Euralis) called “GIE Colza” has been working with INRAE (National Research Institute for Agriculture, Food and Environment, France) on the FSRSO project “Printiver”. This project aimed at enlarging the genetic variability available in winter-type oilseed rape through crossing with spring-type materials to create lines with a winter-type behavior (need of vernalization) and a genetic background that has introgressed spring-type genetic diversity. Two pools have been created and selected for their need of vernalization, date of flowering, yield and other agronomic traits. The Group tested these two pools in multilocal trials. The results show interesting per se value and combining ability.

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Krama, Tatjana, Ronalds Krams, Maris Munkevics, Jonathan Willow, Sergejs Popovs, Didzis Elferts, Linda Dobkeviča, et al. "Physiological stress and higher reproductive success in bumblebees are both associated with intensive agriculture." PeerJ 10 (March 2, 2022): e12953. http://dx.doi.org/10.7717/peerj.12953.

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Free-living organisms face multiple stressors in their habitats, and habitat quality often affects development and life history traits. Increasing pressures of agricultural intensification have been shown to influence diversity and abundance of insect pollinators, and it may affect their elemental composition as well. We compared reproductive success, body concentration of carbon (C) and nitrogen (N), and C/N ratio, each considered as indicators of stress, in the buff-tailed bumblebee (Bombus terrestris). Bumblebee hives were placed in oilseed rape fields and semi-natural old apple orchards. Flowering season in oilseed rape fields was longer than that in apple orchards. Reproductive output was significantly higher in oilseed rape fields than in apple orchards, while the C/N ratio of queens and workers, an indicator of physiological stress, was lower in apple orchards, where bumblebees had significantly higher body N concentration. We concluded that a more productive habitat, oilseed rape fields, offers bumblebees more opportunities to increase their fitness than a more natural habitat, old apple orchards, which was achieved at the expense of physiological stress, evidenced as a significantly higher C/N ratio observed in bumblebees inhabiting oilseed rape fields.

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Lewis, DC, TD Potter, SE Weckert, and IL Grant. "Effect of nitrogen and phosphorus fertilizers on the seed yield and oil concentration of oilseed rape (Brassica napus L.) and the prediction of responses by soil tests and past paddock use." Australian Journal of Experimental Agriculture 27, no. 5 (1987): 713. http://dx.doi.org/10.1071/ea9870713.

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The response of oilseed rape to applied nitrogen and phosphorus was investigated in 2 areas of the South East of South Australia. The nitrogen rates applied varied from 0 to 50 kg/ha, while phosphorus rates applied in the Mundulla area ranged from 0 to 20 kg/ha and 0 to 34 kg/ha in the Millicent area. At 9 sites in the Mundulla area, where soils were primarily sandy loam over clay, oilseed rape yields were increased significantly by applied nitrogen at 7 sites and by applied phosphorus at 2 sites. On heavy black clay and peat soils in the Millicent area, oilseed rape yields were increased significantly by applied nitrogen at 5 of the 12 sites and by applied phosphorus at 6 sites. Of the measured soil variables, anaerobic ammonium nitrogen measured in the top 10 cm best predicted responses in seed yield to applied nitrogen. The critical nutrient range was 45-65 mg/kg. The response of oilseed rape to applied nitrogen was highly correlated with past paddock use but varied between the 2 areas. From the prediction equations developed, it was concluded that, in the Mundulla area, a significant (P< 0.05) nitrogen response was likely if the oilseed rape followed 2 or more crops, the last a non-legume, but was unlikely if the oilseed rape followed 1 or more years of pasture. At Millicent, a nitrogen response was likely if the oilseed rape was grown as the sixth crop in a continuous cropping program, and was unlikely if it was the first or second crop in the rotation, provided the preceding crop was a non-legume. The response of oilseed rape to applied phosphorus was highly correlated to extractable soil phosphorus measured in the top 10 cm (Colwell). The critical nutrient range was 20-25 mg/kg for the sandy loam soils at Mundulla and 40-50 mg/kg for the black clay and peat soils at Millicent. Nitrogen applications significantly increased seed oil content at 6 sites, significantly decreased it at 2 sites and had no effect at 13 sites. Phosphorus significantly increased seed oil content at only 1 site, significantly decreased it at 3 sites, and had no effect at the other 17 sites.

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Parkin, I. A. P., and D. J. Lydiate. "Conserved patterns of chromosome pairing and recombination in Brassica napus crosses." Genome 40, no. 4 (August 1, 1997): 496–504. http://dx.doi.org/10.1139/g97-066.

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The patterns of chromosome pairing and recombination in two contrasting Brassica napus F1 hybrids were deduced. One hybrid was from a winter oilseed rape (WOSR) × spring oilseed rape cross, the other from a resynthesized B. napus × WOSR cross. Segregation at 211 equivalent loci assayed in the population derived from each hybrid produced two collinear genetic maps. Alignment of the maps indicated that B. napus chromosomes behaved reproducibly as 19 homologous pairs and that the 19 distinct chromosomes of B. napus each recombined with unique chromosomes from the interspecific hybrid between Brassica rapa and Brassica oleracea. This result indicated that the genomes of the diploid progenitors of amphidiploid B. napus have remained essentially unaltered since the formation of the species and that the progenitor genomes were similar to those of modern-day B. rapa and B. oleracea. The frequency and distribution of crossovers were almost indistinguishable in the two populations, suggesting that the recombination machinery of B. napus could cope easily with different degrees of genetic divergence between homologous chromosomes. Efficient recombination in wide crosses will facilitate the introgression of novel alleles into oilseed rape from B. rapa and B. oleracea (via resynthesized B. napus) and reduce linkage drag.Key words: integrating genetic maps, microspore culture, segregation distortion, recombination frequency, locus distribution.

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Parratt, D., W. H. Macfarlane Smith, G. Thomson, L. A. Cameron, and R. D. Butcher. "Evidence That Oilseed Rape (Brassica Napus SSP. Oleifera) Causes Respiratory Illness in Rural Dwellers." Scottish Medical Journal 40, no. 3 (June 1995): 74–76. http://dx.doi.org/10.1177/003693309504000305.

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A study of 25 residents in a small Scottish village over a two-year period investigated respiratory symptom reporting in the presence or absence of oilseed rape. Symptom reporting in the year when oilseed rape virtually surrounded the village, varied during the growing season of the crop and was at its highest coincident with peak flowering. At the same period of the following year when the crop was absent, symptom reporting was significantly lower. The symptoms which correlated most strongly with peak oilseed rape flowering were sneezing, cough, headache, eye irritation and the total of these and other symptoms. Increased symptoms were reported by 12 of the participants though only seven of these were judged to be atopic. The symptoms did not correlate with levels of oilseed rape pollen but there is no clear evidence as to which of the other factors associated with the crop might be the cause.

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Hu, Xiaojia, Daniel P. Roberts, Lihua Xie, Jude E. Maul, Changbing Yu, Yinshui Li, Yinbo Zhang, Lu Qin, and Xing Liao. "Components of a Rice-Oilseed Rape Production System Augmented with Trichoderma sp. Tri-1 Control Sclerotinia sclerotiorum on Oilseed Rape." Phytopathology® 105, no. 10 (October 2015): 1325–33. http://dx.doi.org/10.1094/phyto-12-14-0371-r.

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Sclerotinia sclerotiorum causes serious yield losses on many crops throughout the world. A multicomponent treatment that consisted of the residual rice straw remaining after rice harvest and Trichoderma sp. Tri-1 (Tri-1) formulated with the oilseed rape seedcake fertilizer was used in field soil infested with S. sclerotiorum. This treatment resulted in oilseed rape seed yield that was significantly greater than the nontreated control or when the fungicide carbendizem was used in the presence of this pathogen in field trials. Yield data suggested that the rice straw, oilseed rape seedcake, and Tri-1 components of this treatment all contributed incrementally. Similar treatment results were obtained regarding reduction in disease incidence. Slight improvements in yield and disease incidence were detected when this multicomponent treatment was combined with a fungicide spray. Inhibition of sclerotial germination by this multicomponent treatment trended greater than the nontreated control at 90, 120, and 150 days in field studies but was not significantly different from this control. This multicomponent treatment resulted in increased yield relative to the nontreated control in the absence of pathogen in a greenhouse pot study, while the straw alone and the straw plus oilseed rape seedcake treatments did not; suggesting that Tri-1 was capable of promoting growth. Experiments reported here indicate that a treatment containing components of a rice-oilseed rape production system augmented with Tri-1 can control S. sclerotiorum on oilseed rape, be used in integrated strategies containing fungicide sprays for control of this pathogen, and promote plant growth.

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Cinkocki, Renata, Nikola Lipková, Soňa Javoreková, Jana Petrová, Jana Maková, Juraj Medo, and Ladislav Ducsay. "The Impact of Growth-Promoting Streptomycetes Isolated from Rhizosphere and Bulk Soil on Oilseed Rape (Brassica napus L.) Growth Parameters." Sustainability 13, no. 10 (May 19, 2021): 5704. http://dx.doi.org/10.3390/su13105704.

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Inoculation of Streptomyces to improve oilseed rape (Brassica napus L.) yields and minimise the use of chemical fertilisers is a promising sustainable strategy. In this study, we isolated 72 actinobacterial strains from rhizosphere of oilseed rape and maize and from bulk soil for screening and characterising their antimicrobial activity. Nine promising strains, identified as Streptomyces sp. by morphology, physiological characteristics, and 16S rRNA gene sequencing, were selected for their plant growth-promoting traits and in planta experiments. The actinobacterial strains were positive for IAA production, siderophore production, and HCN production. In planta experiments were conducted by soaking the oilseed rape seeds in the actinobacterial suspension, followed by plant growth under controlled conditions in a cultivate chamber (22–28 °C, 8 h dark/16 h light, constant humidity 80%). We recorded root and shoot length (cm) and seedling fresh weight (g). For most of the abovementioned parameters, a significant enhancement was observed with strain KmiRC20A118 treatment. The length of the root increased by 53.14%, the shoot length increased by 65.6%, and the weight of the fresh plant by 60% compared to the control. The integrated application of PGPS (Plant Growth Promoting Streptomyces) from the rhizosphere of oilseed rape is a promising strategy to improve the growth of oilseed rape.

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Hennin, Caroline, Monica Höfte, and Elke Diederichsen. "Functional Expression of Cf9 and Avr9 Genes in Brassica napus Induces Enhanced Resistance to Leptosphaeria maculans." Molecular Plant-Microbe Interactions® 14, no. 9 (September 2001): 1075–85. http://dx.doi.org/10.1094/mpmi.2001.14.9.1075.

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The tomato Cf9 resistance gene induces an Avr9-dependent hypersensitive response (HR) in tomato and transgenic Solanaceae spp. We studied whether the Cf9 gene product responded functionally to the corresponding Avr9 gene product when introduced in a heterologous plant species. We successfully expressed the Cf9 gene under control of its own promoter and the Avr9 or Avr9R8K genes under control of the p35S1 promoter in transgenic oilseed rape. We demonstrated that the transgenic oilseed rape plants produced the Avr9 elicitor with the same specific necrosis-inducing activity as reported for Cladosporium fulvum. An Avr9-dependent HR was induced in Cf9 oilseed rape upon injection of intercellular fluid containing Avr9. We showed Avr9-specific induction of PR1, PR2, and Cxc750 defense genes in oilseed rape expressing Cf9. Cf9 × Avr9 oilseed rape did not result in seedling death of the F1 progeny, independent of the promoters used to express the genes. The F1 (Cf9 × Avr9) plants, however, were quantitatively more resistant to Leptosphaeria maculans. Phytopathological analyses revealed that disease development of L. maculans was delayed when the pathogen was applied on an Avr9-mediated HR site. We demonstrate that the Cf9 and Avr9 gene can be functionally expressed in a heterologous plant species and that the two components confer an increase in disease resistance.

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Journal articles on the topic 'Oilseed rape'

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