Relevant bibliographies by topics / Doubled haploid (DH) population

Academic literature on the topic 'Doubled haploid (DH) population'

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Published: 4 June 2021
Last updated: 20 February 2023

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Journal articles on the topic "Doubled haploid (DH) population"

1

Hu, Haixiao, Yujie Meng, Wenxin Liu, Shaojiang Chen, and Daniel E. Runcie. "Multi-Trait Genomic Prediction Improves Accuracy of Selection among Doubled Haploid Lines in Maize." International Journal of Molecular Sciences 23, no. 23 (November 22, 2022): 14558. http://dx.doi.org/10.3390/ijms232314558.

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Recent advances in maize doubled haploid (DH) technology have enabled the development of large numbers of DH lines quickly and efficiently. However, testing all possible hybrid crosses among DH lines is a challenge. Phenotyping haploid progenitors created during the DH process could accelerate the selection of DH lines. Based on phenotypic and genotypic data of a DH population and its corresponding haploids, we compared phenotypes and estimated genetic correlations between the two populations, compared genomic prediction accuracy of multi-trait models against conventional univariate models within the DH population, and evaluated whether incorporating phenotypic data from haploid lines into a multi-trait model could better predict performance of DH lines. We found significant phenotypic differences between DH and haploid lines for nearly all traits; however, their genetic correlations between populations were moderate to strong. Furthermore, a multi-trait model taking into account genetic correlations between traits in the single-environment trial or genetic covariances in multi-environment trials can significantly increase genomic prediction accuracy. However, integrating information of haploid lines did not further improve our prediction. Our findings highlight the superiority of multi-trait models in predicting performance of DH lines in maize breeding, but do not support the routine phenotyping and selection on haploid progenitors of DH lines.
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2

Friesen, H., and R. Scarth. "Utilization of doubled haploid technique in Brassica rapa population improvement." Canadian Journal of Plant Science 80, no. 1 (January 1, 2000): 75–82. http://dx.doi.org/10.4141/p99-041.

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The utilization of doubled haploid (DH) plants in population improvement of Brassica rapa was studied by randomly intercrossing 4, 8, 12 and 22 DH lines developed from the B. rapa cultivar Reward and the B. rapa breeding line DSC3 for two generations to constitute synthetic populations. The synthetic populations and the DH plants used in their formation were evaluated for agronomic performance at two locations in the field in 1996 and for genetic variation using random amplified polymorphic DNA (RAPD) analysis. Intercrossing as few as four DH lines from the breeding line DSC-3 produced a synthetic population with improved performance over that of the contributing DH lines. The synthetic population produced from the interpollination of eight DH lines showed an agronomic performance over that of the contributing DH lines to a level similar to the Reward donor population. RAPD analysis efficiently characterized the genotypic variation present in DH lines and synthetic populations, detecting 22–72% polymorphism between DH lines, 17–53% and 27–47% polymorphism in the first and second synthetic populations, respectively. This characterization may be useful as a tool in the reestablishment of heterogeneity and recovery of agronomic performance in B. rapa synthetic populations derived from DH lines by determining the level of genetic variability among DH lines and therefore optimal population size. Key words: Brassica rapa, synthetic population, doubled haploids, RAPD, agronomic performance
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3

Schön, C. C., P. M. Hayes, T. K. Blake, and S. J. Knapp. "Gametophytic selection in a winter × spring barley cross." Genome 34, no. 6 (December 1, 1991): 918–22. http://dx.doi.org/10.1139/g91-141.

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Segregation distortion and the consequences of gametophytic selection were assessed in a winter × spring barley cross by comparing segregation of enzyme, storage protein, DNA, and morphological markers in three populations derived from the same cross: a control F2 (F2C), a doubled-haploid (DH) population, and an F2 derived from F1 plants self-pollinated at 10 °C (F2T). Segregation distortion was present in the F2T and the doubled-haploid population. Based on a comparison of the F2C and the F2T, gametophytic selection as a consequence of self-pollination at 10 °C was operative on chromosome 7 in regions linked to Rrn2. Segregation distortion in favor of the winter parent was found in the doubled-haploid population. There were significant deviations from expected segregation ratios at two loci, but only at one of the loci was the gene number significantly different from the F2C. Despite segregation distortion, the doubled-haploid population should be suitable for linkage analyses, as estimates of recombination based on F2 and doubled-haploid data were in close agreement.Key words: Hordeum vulgare, segregation distortion, doubled haploids, gametophytic selection, cold tolerance.
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Patel, J. D., E. Reinbergs, and S. O. Fejer. "Recurrent selection in doubled-haploid populations of barley (Hordeurn vulgare L.)." Canadian Journal of Genetics and Cytology 27, no. 2 (April 1, 1985): 172–77. http://dx.doi.org/10.1139/g85-026.

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Cycle zero (C0) of recurrent selection in barley (Hordeum vulgare L.) was initiated by diallel mating of seven highly selected parents. A total of 398 doubled-haploid (C0DH) lines were derived from 21 crosses and were evaluated along with their parents in C0 experiment. Seven doubled-haploid lines (DH) were selected from the cycle zero (C0) experiment and intercrossed to form cycle 1 (C1). From the 21 crosses of the diallel, 260 doubled-haploid lines (C1DH) were derived and were evaluated along with the C0 and C1 parents. The frequency distribution of the standardized means of the DH lines from C0 and C1 indicated a slight response to selection for seed yield. Genetic analysis of the C1DH population showed high additive genetic variance for yield per hill, plant height, and yield per spike, and a high proportion of additive × additive epistasis for spikes per hill, days to heading, and 100-seed weight. Seven doubled-haploid lines were selected from different high-yielding crosses represented by C1DH lines. High selection pressure was applied for yield per hill, yield per spike, and spikes per hill. Further response to selection is expected in later cycles. The seven selected doubled-haploid lines will be used as the parents of the next recurrent selection cycle.Key words: recurrent selection, doubled haploids, additive, epistasis, heritability, Hordeum.
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Mikhailov, M. E. "Efficiency of the backcrossing method in dihaploid maize breeding." Plant Biotechnology and Breeding 2, no. 2 (August 29, 2019): 24–32. http://dx.doi.org/10.30901/2658-6266-2019-2-24-32.

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The doubled haploid (DH) lines, obtained by doubling the haploid genome, are now widely used in breeding many crops, since they allow to transfer gene variants to the homozygous state in a short time. However, the advantages of doubled haploids are not fully utilized in maize breeding. The present work is devoted to the evaluation of the backcrossing method efficiency and to further development of the original schemes of creating highly productive homozygous maize lines on the basis of DH lines originating from an interline F1 hybrid. Rf7 and Ku123 maize lines were used as the initial material. The breeding cycle consisted of producing haploid plants in the selected genotype (matroclinic haploidy using an inducer), subsequent chromosome doubling (colchicine‑induced or spontaneous), followed by multiplication of the doubled haploids for obtaining a new set of DH lines. In the first cycle, the DH lines were obtained from the F1 hybrid (Rf7 × Ku123), while in the subsequent cycles they were obtained from the genotypes obtained by crossing a DH line selected from the previous cycle with F1, P1 or P2. Three cycles of selection for productivity were performed, and in 2017 the DH lines obtained in all cycles were simultaneously tested in the field. The breeding progress was estimated by the increase in the first ear productivity compared to the best parent Rf7 (103.9 g per plant in 2017). The first selection cycle resulted in 43 DH lines obtained on the basis of the F1 hybrid. Productivity of the best line rk‑5 amounted to 112.5 g per plant. Three lines (rk‑6, rk‑5 and rk‑22) selected for the next cycle were further crossed with F1 or with the parental line Rf7. The second selection cycle yielded three series containing 41, 49 and 16 lines, while productivity of the best genotypes was 121.2, 117.0 и 107.1 g per plant, respectively. The third cycle included populations of 24 and 8 lines obtained through backcrosses with Rf7 and Ku123 lines, respectively. The best genotypes in these series had productivity of 135.6 and 97.7 g per plant. As a result of selection, the obtained rk‑433 line had a productivity 30.5% higher than that of the best parent Rf7. The progress averaged 10.2% per cycle. In maize breeding using doubled haploids it is promising to use backcrosses of the selected DH lines with the initial material or with F1. Thanks to such an approach, a noticeable progress can be reached with a small number of cycles including from 20 to 50 DH lines.
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Dewan, D. B., G. Rakow, and R. K. Downey. "Growth and yield of doubled haploid lines of oilseed Brassica rapa." Canadian Journal of Plant Science 78, no. 4 (October 1, 1998): 537–44. http://dx.doi.org/10.4141/p97-104.

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The production of doubled haploid (DH) lines of Brassica rapa could be an efficient procedure for the development of inbred parents for hybrid production. A total of 162 B. rapa DH lines were evaluated in field tests at Saskatoon, Canada, in single row, replicated tests and 10 DH lines were tested in four-row plot, multilocation, replicated tests. Seed of DH lines was produced by bud selfing in the greenhouse. Approximately one-fifth of all DH lines tested were chlorophyll deficient, presumably due to the expression of recessive alleles. Inbreeding depression was evident in low seed and biological yields, low number of seeds per pod and delayed flowering. Seed yield of DH lines was positively associated with the number of seeds per pod, early flowering and a long pod-filling period. One DH line was equal in yield to its donor population (DP), suggesting that dominance deviation was the genetic basis for high seed yield in this species. The consistent performance of DH lines over years and locations indicated that DH lines may be selected after 1 year of evaluation for combining ability testing. Higher yielding DH lines of B. rapa must be selected before they can be used as parents for hybrid development. Key words: Brassica rapa, doubled haploid, field evaluation
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Meena, Rakesh Kumar. "A Review on Haploid and Double Haploids in Ornamental Plants." Current Research in Agriculture and Farming 2, no. 3 (June 30, 2021): 1–7. http://dx.doi.org/10.18782/2582-7146.138.

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Sporophyte plants with many gametophytic chromosomes are called haploid plants. These plants can be produced naturally or through in vitro or in vivo induction techniques. Double haploid (DH) can be obtained by doubling the number of haploid chromosomes spontaneously or artificially. They are homozygous, and this homozygosity will be realized in the life cycle of a generation using the DH production system. This production system is used to correct heterosis. Easy to interact with the DH population. DH can be used as parental inbreds of new varieties or self-pollinated plants or cross-pollinated plants. Haploids can be used to isolate mutants, especially if the mutant allele is not diploid. If the haploid is transformed immediately after the chromosome is copied, the plant can be obtained step by step. By combining biotechnological means with conventional methods, the important goal of improving cultivated plants can be achieved in a short time. This article analyzes the various developments in the field of haploid species related to economically important ornamental species.
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GUPTA, MAMTA, MUKESH CHOUDHARY, HARISH KUMAR, VINEET KASWAN, YASHMEET KAUR, JEET RAM CHOUDHARY, and SURESH YADAV. "Doubled Haploid Technology in Maize (Zea mays): Status and Applications." Indian Journal of Agricultural Sciences 92, no. 3 (March 29, 2022): 283–91. http://dx.doi.org/10.56093/ijas.v92i3.122539.

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Maize (Zea mays L.) is the third most important staple crop after rice and wheat with enormous diversity and adaptation ability. Hybrid breeding is the most important approach for developing high yielding cultivars in maize. It relies upon the generation of pure inbred lines with desirable traits in quick span to achieve higher genetic gains. Rapidly rising global population and climate change necessitates the development of innovative technologies that can help to safeguard the food security in future. Doubled Haploid (DH) technology is the best approach for rapid development of new inbred lines and has contributed immensely in the rapid generation of inbred lines and hybrid development. In addition, the use of molecular markers with DH technology resulted into mapping of genomic regions for different traits. The recent development in identification of alternative markers for haploid selection and genome editing approaches will further strengthen the DH technology for commercial maize breeding. This review describes important landmarks of maize DH technology, its applications, and recent advances in utilization of emerging technologies, viz. CRIPSR-cas and genomics approaches for DH technology
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Bentolila, S., T. Hardy, C. Guitton, and G. Freyssinet. "Comparative genetic analyses of F2 plants and anther culture derived plants of maize." Genome 35, no. 4 (August 1, 1992): 575–82. http://dx.doi.org/10.1139/g92-086.

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The doubled haploid (DH) lines represent a potentially powerful tool in maize genetics and breeding. The goal of this work was to test the ability of the DH lines to be used in these research areas. This was achieved by comparing the segregation and recombination of 94 restriction fragment length polymorphism (RFLP) markers in an F2 population and an anther culture (AC) derived population of maize (Zea mays L.). These were obtained from the cross of R6 (an elite maize line of Mo17/Oh43 group, not responsive to anther culture) with DH89.1 (a maize line very responsive to anther culture provided by Dr. M. Beckert). Despite the single factor disturbed segregations and the impossibility to discriminate between the loose and numerous spurious linkages detected with DH data, a linkage map could be constructed. The comparison of the DH linkage map with the F2 linkage map demonstrated two points. First, the markers order is conserved between the two maps. Second and most importantly, 97% of the length covered by the DH map proved to be consistent with the F2 map. These results are discussed in relation to the use of DH lines in maize breeding and gene mapping.Key words: corn, doubled haploid lines, restriction fragment length polymorphism markers, disturbed segregation, mapping.
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Navabi, Z. K., I. A. P. Parkin, J. C. Pires, Z. Xiong, M. R. Thiagarajah, A. G. Good, and M. H. Rahman. "Introgression of B-genome chromosomes in a doubled haploid population of Brassica napus × B. carinata." Genome 53, no. 8 (August 2010): 619–29. http://dx.doi.org/10.1139/g10-039.

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The Brassica B-genome species possess many valuable agronomic and disease resistance traits. To transfer traits from the B genome of B. carinata into B. napus , an interspecific cross between B. napus and B. carinata was performed and a doubled haploid (DH) population was generated from the BC2S3 generation. Successful production of interspecific DH lines as identified using B-genome microsatellite markers is reported. Five percent of DH lines carry either intact B-genome chromosomes or chromosomes that have deletions. All of the DH lines have linkage group J13/B7 in common. This was further confirmed using B. nigra genomic DNA in a fluorescent in situ hybridization assay where the B-genome chromosomes were visualized and distinguished from the A- and C-genome chromosomes. The 60 DH lines were also evaluated for morphological traits in the field for two seasons and were tested for resistance to blackleg, caused by Leptosphaeria maculans , under greenhouse conditions. Variation in the DH population followed a normal distribution for several agronomic traits and response to blackleg. The lines with B-genome chromosomes were significantly different (p < 0.01) from the lines without B-genome chromosomes for both morphological and seed quality traits such as days to flowering, days to maturity, and erucic acid content.
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Dissertations / Theses on the topic "Doubled haploid (DH) population"

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Sadeque, Abdus. "Genetic mapping of noodle quality characters and rust resistance in hexaploid wheat." Thesis, The University of Sydney, 2008. http://hdl.handle.net/2123/3795.

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Polyphenol oxidase (PPO) catalyses undesirable darkening in wheat products such as Asian noodles. Genetic variation for PPO activity is characterized in bread wheat. Australian wheat breeding programmes recognize that reduced PPO activity is an important quality target. Despite this interest from breeders, no varieties possessing extremely low and null PPO activity exist. The development of null PPO wheat varieties is dependant on an understanding of the genetic control of the null phenotype. Knowledge of these factors will accelerate efforts to develop them. The inheritance of PPO activity was investigated in two populations that were derived from hybrids between a null PPO genotype and Australian wheat varieties Lang and QAlBis. Observed genetic ratios were consistent with two and three gene control, respectively in these populations. QTL mapping was performed in the QALBis x VAW08-A17 population. The Diversity Array Technology (DArT) approach was employed to genotype the QALBis x VAW08-A17 population. Three highly significant QTLs that control PPO activity were identified on chromosomes 2AL, 2BS and 2DL. Close associations between PPO activity and DArT marker loci wPt-7024, wPt-0094 and wPt-2544 were observed, respectively. Collectively, these loci explained 74% of the observed variation in PPO activity across seasons. Significant QTLs on chromosomes 1B and 3B were also identified that together explained an additional 17% of variation in PPO activity. The relationship between PPO activity and yellow alkaline noodles (YAN) colour stability parameters was investigated in a DM5637*B8 x H45 doubled haploid population. PPO activity and changes in YAN brightness (ΔL* 0-24h) and yellowness (Δb* 0-24h) in both seasons were analysed. Quantitative trait analyses of PPO activity, flour yellowness (b*) and YAN colour stability was also conducted in this population. QTL mapping of variation in PPO activity in the DM5637*B8 x H45 DH population identified a highly significant QTL on chromosome 2AL, which explained 52% of the observed variation across seasons. Regression analysis identified that wPt-7024 was highly significantly associated with PPO activity in this population. A highly significant association between this marker and PPO was also identified in the QALBis x VAW08-A17 population. Collectively, the three identified QTLs (on chromosomes 2AL, 7A and 7B) explained 71% of variation in PPO activity across seasons. A highly significant (P<0.001) QTL on chromosome 2B along with significant (P<0.01) QTLs on the chromosomes 1A, 3B, 4B and 5B were found to control flour yellowness. The QTLs on 2B, 4B and 5B were detected in both seasons analysed and accounted for 90% of variation in flour b* across seasons. The study on YAN colour stability located two highly significant (P<0.001) QTLs and two significant (P<0.01) QTLs that controlled the change in brightness of yellow alkaline noodle. The 2A QTL accounted for 64% of observed variation across seasons. It was in the same location as the PPO QTL and shared a common closest marker wPt-7024. Only one significant QTL for YAN a* (0-24h) was identified. It accounted for 12% of variation across seasons and was only detected in one season. One highly significant (P<0.001) QTL and two significant (P<0.01) QTLs were identified that controlled the change in yellowness of yellow alkaline noodle. The 2A QTL accounted for 68% of observed variation across seasons. The location of this QTL corresponded with that of 2A QTLs for PPO activity and L* of YAN in this study. Furthermore, wPt-7024 was also identified as the marker with the most significant association with L*. The identification of a correlation between the characters and a common location of a highly significant QTL for each of these characters indicates that it is likely that PPO activity is directly responsible for a large proportion of the changes in brightness and yellowness of YAN. QTLs for L* and b* of YAN were detected in a common location on chromosome 1A. However, no corresponding QTL was identified that controls PPO activity, highlighting the complexity of the relationship between these traits. Resistance to three rust pathogens (Puccinia graminis, Puccinia striiformis, and Puccinia triticina) was also investigated in the DM5637*B8 x H45 DH population because they are major yield limiting diseases in wheat. Disease response data at the seedling stage were converted to genotypic scores for rust genes Sr24/Lr24, Sr36, Lr13 and Yr7 to construct a genetic linkage map. No recombination was observed between rust resistance genes Sr36, Lr13 and Yr7 in this DH population. Therefore, these genes mapped in the same position on chromosome 2B. The Lr24/Sr24 locus was incorporated into the chromosome 3D map. Interval mapping analysis identified QTLs on chromosomes 2B, 3B, 4B and 5B that control adult plant resistance (APR) to stripe rust. Two QTLs on chromosomes 2B and 3D were identified that controlled APR to leaf rust in this DH population.
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Sadeque, Abdus. "Genetic mapping of noodle quality characters and rust resistance in hexaploid wheat." University of Sydney, 2008. http://hdl.handle.net/2123/3795.

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Doctor of Philosophy
Polyphenol oxidase (PPO) catalyses undesirable darkening in wheat products such as Asian noodles. Genetic variation for PPO activity is characterized in bread wheat. Australian wheat breeding programmes recognize that reduced PPO activity is an important quality target. Despite this interest from breeders, no varieties possessing extremely low and null PPO activity exist. The development of null PPO wheat varieties is dependant on an understanding of the genetic control of the null phenotype. Knowledge of these factors will accelerate efforts to develop them. The inheritance of PPO activity was investigated in two populations that were derived from hybrids between a null PPO genotype and Australian wheat varieties Lang and QAlBis. Observed genetic ratios were consistent with two and three gene control, respectively in these populations. QTL mapping was performed in the QALBis x VAW08-A17 population. The Diversity Array Technology (DArT) approach was employed to genotype the QALBis x VAW08-A17 population. Three highly significant QTLs that control PPO activity were identified on chromosomes 2AL, 2BS and 2DL. Close associations between PPO activity and DArT marker loci wPt-7024, wPt-0094 and wPt-2544 were observed, respectively. Collectively, these loci explained 74% of the observed variation in PPO activity across seasons. Significant QTLs on chromosomes 1B and 3B were also identified that together explained an additional 17% of variation in PPO activity. The relationship between PPO activity and yellow alkaline noodles (YAN) colour stability parameters was investigated in a DM5637*B8 x H45 doubled haploid population. PPO activity and changes in YAN brightness (ΔL* 0-24h) and yellowness (Δb* 0-24h) in both seasons were analysed. Quantitative trait analyses of PPO activity, flour yellowness (b*) and YAN colour stability was also conducted in this population. QTL mapping of variation in PPO activity in the DM5637*B8 x H45 DH population identified a highly significant QTL on chromosome 2AL, which explained 52% of the observed variation across seasons. Regression analysis identified that wPt-7024 was highly significantly associated with PPO activity in this population. A highly significant association between this marker and PPO was also identified in the QALBis x VAW08-A17 population. Collectively, the three identified QTLs (on chromosomes 2AL, 7A and 7B) explained 71% of variation in PPO activity across seasons. A highly significant (P<0.001) QTL on chromosome 2B along with significant (P<0.01) QTLs on the chromosomes 1A, 3B, 4B and 5B were found to control flour yellowness. The QTLs on 2B, 4B and 5B were detected in both seasons analysed and accounted for 90% of variation in flour b* across seasons. The study on YAN colour stability located two highly significant (P<0.001) QTLs and two significant (P<0.01) QTLs that controlled the change in brightness of yellow alkaline noodle. The 2A QTL accounted for 64% of observed variation across seasons. It was in the same location as the PPO QTL and shared a common closest marker wPt-7024. Only one significant QTL for YAN a* (0-24h) was identified. It accounted for 12% of variation across seasons and was only detected in one season. One highly significant (P<0.001) QTL and two significant (P<0.01) QTLs were identified that controlled the change in yellowness of yellow alkaline noodle. The 2A QTL accounted for 68% of observed variation across seasons. The location of this QTL corresponded with that of 2A QTLs for PPO activity and L* of YAN in this study. Furthermore, wPt-7024 was also identified as the marker with the most significant association with L*. The identification of a correlation between the characters and a common location of a highly significant QTL for each of these characters indicates that it is likely that PPO activity is directly responsible for a large proportion of the changes in brightness and yellowness of YAN. QTLs for L* and b* of YAN were detected in a common location on chromosome 1A. However, no corresponding QTL was identified that controls PPO activity, highlighting the complexity of the relationship between these traits. Resistance to three rust pathogens (Puccinia graminis, Puccinia striiformis, and Puccinia triticina) was also investigated in the DM5637*B8 x H45 DH population because they are major yield limiting diseases in wheat. Disease response data at the seedling stage were converted to genotypic scores for rust genes Sr24/Lr24, Sr36, Lr13 and Yr7 to construct a genetic linkage map. No recombination was observed between rust resistance genes Sr36, Lr13 and Yr7 in this DH population. Therefore, these genes mapped in the same position on chromosome 2B. The Lr24/Sr24 locus was incorporated into the chromosome 3D map. Interval mapping analysis identified QTLs on chromosomes 2B, 3B, 4B and 5B that control adult plant resistance (APR) to stripe rust. Two QTLs on chromosomes 2B and 3D were identified that controlled APR to leaf rust in this DH population.
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Song, Jiayin (Susan). "Genomic selection in a single cross doubled-haploid wheat population." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/60581.

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A traditional wheat breeding program normally takes 7 to 12 years to develop a new cultivar to be eligible for commercial release. Genomic selection (GS), which uses single-nucleotide polymorphism (SNP) marker information to predict breeding values, has been proven to be an efficient method to accelerate the lengthy breeding process and increase the resultant gain in many animal and plant species. In this study, two GS algorithms, Genomic Best Linear Unbiased Prediction (GBLUP) and Reproducing Kernel Hilbert Space (RKHS) regression, were evaluated using grain yield data generated from a single hard red winter wheat (Triticum aestivum L.) full-sib doubled-haploid (DH) population in two consecutive generations. In each generation, a total of 257 individuals were genotyped with 14,028 SNP markers using “Genotyping-by-Sequencing” (GBS). Due to the uniformity of genetic material across generations, year effect was considered as an environmental factor or replication for the analysis. Potential upward bias in model’s predictive accuracy was estimated by comparing the within-year cross-validation scheme with the cross-year prediction scheme. The effect of SNP marker number on the models’ predictive ability was also analyzed by creating SNP subsets filtered with absolute pairwise correlation (t) value. In general, RKHS produced higher predictive ability than GBLUP for predicting grain yield in this population. A 32 and 38% decrease in predictive ability was observed for GBLUP and RKHS models, respectively, when comparing within-year cross-validation and cross-year prediction models’ results. A t value of 0.4 could produce a similar predictive ability compared to using the unfiltered full SNP set, providing less computation- and time-consuming strategy. In the context of an ongoing breeding program, this study also demonstrated confidence of line selection based on GS results, advocating the implementation of GS in wheat variety development.
Forestry, Faculty of
Graduate
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4

Friesen, Holly A. "The application of doubled haploid plants to population improvement in Brassica rapa." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq23311.pdf.

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Kosellek, Christiane Verfasser], W. Eberhard [Akademischer Betreuer] Weber, Klaus [Akademischer Betreuer] Pillen, and Thomas [Akademischer Betreuer] [Miedaner. "Inheritance of resistance to Septoria tritici blotch in the winter wheat doubled haploid population Solitär x Mazurka / Christiane Kosellek. Betreuer: W. Eberhard Weber ; Klaus Pillen ; Thomas Miedaner." Halle, Saale : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2013. http://d-nb.info/1046312782/34.

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Valdés, Velázquez Ariana Istar. "Inheritance of microspore embryogenic potential and direct embryo to plant conversion in the oilseed rape DH population DH4079 x Express 617." Doctoral thesis, 2016. http://hdl.handle.net/11858/00-1735-0000-0023-3E44-8.

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Brown, Hoeppner Allison Catherine. "Field evaluation and molecular study of a doubled haploid population of Brassica napus segregating for linolenic acid content." 2002. http://hdl.handle.net/1993/19604.

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Book chapters on the topic "Doubled haploid (DH) population"

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Alahmad, Samir, Charlotte Rambla, Kai P. Voss-Fels, and Lee T. Hickey. "Accelerating Breeding Cycles." In Wheat Improvement, 557–71. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-90673-3_30.

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AbstractThe rate of genetic gain in wheat improvement programs must improve to meet the challenge of feeding a growing population. Future wheat varieties will need to produce record high yields to feed an anticipated 25% more inhabitants on this planet by 2050. The current rate of genetic gain is slow and cropping systems are facing unprecedented fluctuations in production. This instability stems from major changes in climate and evolving pests and diseases. Rapid genetic improvement is essential to optimise crop performance under such harsh conditions. Accelerating breeding cycles shows promise for increasing the rate of genetic gain over time. This can be achieved by concurrent integration of cutting-edge technologies into breeding programs, such as speed breeding (SB), doubled haploid (DH) technology, high-throughput phenotyping platforms and genomic selection (GS). These technologies empower wheat breeders to keep the pace with increasing food demand by developing more productive and robust varieties sooner. In this chapter, strategies for shortening the wheat breeding cycle are discussed, along with the opportunity to integrate technologies to further accelerate the rate of genetic gain in wheat breeding programs.
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Aboobucker, Siddique I., Talukder Z. Jubery, Ursula K. Frei, Yu-Ru Chen, Tyler Foster, Baskar Ganapathysubramanian, and Thomas Lübberstedt. "Protocols for In Vivo Doubled Haploid (DH) Technology in Maize Breeding: From Haploid Inducer Development to Haploid Genome Doubling." In Plant Gametogenesis, 213–35. New York, NY: Springer US, 2022. http://dx.doi.org/10.1007/978-1-0716-2253-7_16.

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Hinga, Melissa E., and Yunbi Xu. "A Doubled Haploid Rice Population and Its Genetic Analysis Using Microsatellite Markers." In Plant Biotechnology 2002 and Beyond, 551–53. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-2679-5_114.

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Lonergan, P. F., R. D. Graham, S. J. Barker, and J. G. Paull. "Mapping of chromosome regions associated with increased vegetative zinc accumulation using a barley doubled haploid population." In Plant Nutrition, 84–85. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/0-306-47624-x_40.

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Selvakumar, Raman. "An Update on Radish Breeding Strategies: An Overview." In Plant Breeding - New Perspectives [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.108725.

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In tropical, subtropical, and temperate climates, radish (Raphanus sativus L.) is a popular root vegetable. Radish diversity is intense from the eastern Mediterranean to the Caspian Sea. Many radish varieties have varied leaf morphology, root color, size, shape, flavor, vernalization requirements, and maturity times. Early radish variants were long and tapered rather than cylindrical, bulbous, elliptic, or spherical. For black Spanish radish, European-cultivated variety, and Asian-cultivated radish, three separate domestication processes occurred. The original radishes were black, followed by white in the 1500s then red and round in the 1700s. These are R. sativus L. var. radicula (sativus) or R. sativus L. var. niger radishes. Because of protogyny, self-incompatibility, open architecture, and biennial bolting, radish crosses readily. The fundamental methods for using heterotic breeding potential are SI, CMS, and doubled haploids (DH). This chapter discusses the various breeding strategies like inbred line development by the use of self-incompatibility, hybrid development by using male sterility system, population improvement, mutation breeding, haploid breeding, breeding strategies for biotic and abiotic stresses, QTL mapping, and genome wide and genomic tool in radish. Rapid developments in our understanding of advanced biotechnology technologies will increase our ability to identify cultivars and parental lines, check seed genetic purity, analyze phylogenetic links and genetic diversity, and add specific transgenic traits.
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Wittkop, Benjamin, László Csélènyi, Wolfgang Friedt, and Timm Bernhard. "Doubled haploid (DH) production for barley." In Advances in breeding techniques for cereal crops, 117–42. Burleigh Dodds Science Publishing, 2019. http://dx.doi.org/10.19103/as.2019.0051.04.

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Dutta, Suman, Vignesh Muthusamy, Rajkumar U. Zunjare, and Firoz Hossain. "Accelerated generation of elite inbreds in maize using doubled haploid technology." In Plant Breeding - New Perspectives [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.105824.

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The creation of homozygous parental lines for hybrid development is one of the key components of commercial maize breeding programs. It usually takes up to 6 to 7 generations of selfing to obtain homozygous inbreds from the initial cross using the conventional pedigree method. Using doubled haploid (DH) method, concurrent fixation of all the genes covering entire chromosomes is possible within a single generation. For generation of DH lines, haploids are generated first by several means such as in-vitro method using tissue culture technique and in-vivo method using the haploid inducer (HI) lines. Of which, tissue culture-based methods have shown little promise for large-scale DH production as it needs good infrastructures and technical requirements. In contrast, inducer-based method provides more optimistic solutions for large-scale DH lines production. Due to its rapidity, DH technology is now being adopted in many countries including India for reducing the breeding cycle.
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Moon, H. P., K. H. Kang, S. H. Choi, and S. N. Ahn. "Genetic variation of a single pollen-derived doubled haploid population in rice." In Rice Genetics Collection, 492–98. World Scientific Publishing Company, 2008. http://dx.doi.org/10.1142/9789812814289_0053.

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Yadav, R., B. Courtois, and N. Huang. "RFLP mapping of genes controlling root morphology in an indica/japonica doubled haploid population." In Rice Genetics Collection, 643–49. World Scientific Publishing Company, 2008. http://dx.doi.org/10.1142/9789812814289_0078.

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Sheng, Teng, Zeng Dali, Zheng Xianwu, K. Yasufumi, Qian Qian, and Zhu Lihuang. "QTL analysis of root vitality in a doubled-haploid population derived from anther culture of indica/japonica rice." In Advances in Rice Genetics, 340–41. World Scientific Publishing Company, 2008. http://dx.doi.org/10.1142/9789812814319_0130.

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Conference papers on the topic "Doubled haploid (DH) population"

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Davoyan, R. O., A. S. Zinchenko, E. R. Davoyan, I. V. Bebyakina, D. S. Mikov, Yu S. Zubanova, D. M. Boldakov, V. I. Basov, and A. A. Zelenskaya. "Use of haploid technologies in breading of common wheat of national center of grain named after P.P. Lukyanenko." In 2nd International Scientific Conference "Plants and Microbes: the Future of Biotechnology". PLAMIC2020 Organizing committee, 2020. http://dx.doi.org/10.28983/plmic2020.058.

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In order to obtain doubled haploids (DH) homozygous lines of common wheat in National Center of Grain named after P.P. Lukyanenko (NCG) the methods of selective elimination of chromosomes of maize in genome of intergenal hybrid embryos and anther culture are used. During the 2016-2019 years more than 1,500 diploid lines of 26 varieties of winter common wheat were produced.
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Davoyan, R. O., A. S. Zinchenko, E. R. Davoyan, I. V. Bebyakina, D. S. Mikov, Yu S. Zubanova, D. M. Boldakov, V. I. Basov, and A. A. Zelenskaya. "Use of haploid technologies in breading of common wheat of national center of grain named after P.P. Lukyanenko." In 2nd International Scientific Conference "Plants and Microbes: the Future of Biotechnology". PLAMIC2020 Organizing committee, 2020. http://dx.doi.org/10.28983/plamic2020.058.

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Abstract:
In order to obtain doubled haploids (DH) homozygous lines of common wheat in National Center of Grain named after P.P. Lukyanenko (NCG) the methods of selective elimination of chromosomes of maize in genome of intergenal hybrid embryos and anther culture are used. During the 2016-2019 years more than 1,500 diploid lines of 26 varieties of winter common wheat were produced.
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You might also be interested in the extended bibliographies on the topic 'Doubled haploid (DH) population' for particular source types:
Journal articles
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