Journal articles: 'Peach germplasm'

1

A., Jorge Rodriquez, and Wayne B. Sherman. "`Oro A' Peach Germplasm." HortScience 25, no. 1 (January 1990): 128. http://dx.doi.org/10.21273/hortsci.25.1.128.

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Cai, Zuguo, Wenfang Zeng, Liang Niu, Zhenhua Lu, Guochao Cui, Yunqin Zhu, Lei Pan, Yifeng Ding, and Zhiqiang Wang. "A Practical Method for Peach-related Species Identification and Hybrid Analysis Using Simple Sequence Repeat Markers." Journal of the American Society for Horticultural Science 142, no. 3 (May 2017): 155–62. http://dx.doi.org/10.21273/jashs03930-16.

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Cultivated peach (Prunus persica) is an important fruit species worldwide. The wild relatives in Prunus, such as P. mira, P. davidiana, P. kansuensis, P. ferganensis, and P. persica, are valuable for peach breeding, and early and accurate identification of parental and hybrid genotypes is critical. In this study, 20 representative accessions of peach germplasm from the National Germplasm Repository of Peach in China were used to select a set of 18 simple sequence repeat (SSR) markers for accurate species discrimination. Eight unknown peach samples were successfully identified using the SSR panel and species genotype database. Interspecific hybrid genotypes of P. persica × P. davidiana, P. persica × P. kansuensis, and P. persica × P. ferganensis were also analyzed reliably. The markers were amenable to high-throughput fluorescent labeling and capillary electrophoresis (CE) analysis, allowing rapid and efficient species identification. The practical method described in this study will facilitate peach breeding and germplasm management.

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Bartolozzi, F., M. L. Warburton, S. Arulsekar, and T. M. Gradziel. "Genetic Characterization and Relatedness among California Almond Cultivars and Breeding Lines Detected by Randomly Amplified Polymorphic DNA (RAPD) Analysis." Journal of the American Society for Horticultural Science 123, no. 3 (May 1998): 381–87. http://dx.doi.org/10.21273/jashs.123.3.381.

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Almond [Prunus dulcis (Mill.) D.A. Webb, syn. P. amygdalus, Batsch; P. communis (I.) Archangeli] represents a morphologically and physiologically variable group of populations that evolved primarily in central and southwest Asia. California cultivars have been developed from highly selected subgroups of these populations, while new breeding lines have incorporated germplasm from wild almond and closely related peach species. The genetic relatedness among 17 almond genotypes and 1 peach genotype was estimated using 37 RAPD markers. Genetic diversity within almond was found to be limited despite its need for obligate outcrossing. Three groupings of cultivar origins could be distinguished by RAPD analysis: bud-sport mutations, progeny from interbreeding of early California genotypes, and progeny from crosses to genotypes outside the California germplasm. A similarity index based on the proportion of shared fragments showed relatively high levels of 0.75 or greater within the almond germplasm. The level of similarity between almond and the peach was 0.424 supporting the value of peach germplasm to future almond genetic improvement.

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yu-lin, W. "PEACH GROWING AND GERMPLASM IN CHINA." Acta Horticulturae, no. 173 (December 1985): 51–56. http://dx.doi.org/10.17660/actahortic.1985.173.6.

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Pérez, S., S. Montes, and C. Mejía. "Analysis of Peach Germplasm in Mexico." Journal of the American Society for Horticultural Science 118, no. 4 (July 1993): 519–24. http://dx.doi.org/10.21273/jashs.118.4.519.

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A wide range of peach [Prunus persica (I,.) Batsch] germplasm was collected from the most important peach growing regions in Mexico and some Latin American countries, as well as from breeding programs in the United States, Europe, and South Africa. Budded trees, seedlings derived from selfing cultivars and selections, and seed samples from various growing regions were propagated and planted in central Mexico. Twenty eight morphological or phenological variables were recorded on 52 accessions representing different geographic regions. The highest degree of variability was observed for traits related to bud density and distribution, and to phenological variables associated with temperature requirements such as budbreak and harvest seasons, leaf fall, fruit development, and seed stratification period. Principal component analysis (PCA) integrated groups of phenotypes based mainly on growth habit, shoot diameter, bud and leaf size, as well as resistance to powdery mildew, rust, and frost. PCA provides support for the development of objectives and breeding strategies in the search for germplasm and cultivars for nontraditional peach growing regions.

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Paunovic, S. A., A. S. Paunovic, T. M. Milosevic, M. J. Tisma, and A. Obradovic. "SELECTION OF NATIVE "VINEYARD PEACH" GERMPLASM." Acta Horticulturae, no. 315 (September 1992): 133–40. http://dx.doi.org/10.17660/actahortic.1992.315.17.

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Badenes, M. L., J. Martínez-Calvo, and G. Llácer. "ANALYSIS OF PEACH GERMPLASM FROM SPAIN." Acta Horticulturae, no. 465 (April 1998): 243–50. http://dx.doi.org/10.17660/actahortic.1998.465.30.

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Scorza, Ralph, Shawn A. Mehlenbacher, and Gary W. Lightner. "Inbreeding and Coancestry of Freestone Peach Cultivars of the Eastern United States and Implications for Peach Germplasm Improvement." Journal of the American Society for Horticultural Science 110, no. 4 (July 1985): 547–52. http://dx.doi.org/10.21273/jashs.110.4.547.

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Abstract Analysis of the pedigrees of selected eastern United States freestone peach [Prunus persica (L.) Batsch] cultivars reveals high degrees of inbreeding and coancestry. Commonly used parents include ‘Admiral Dewey’, ‘Elberta’, ‘Halehaven’, ‘J.H. Hale’, ‘Rio Oso Gem’, and ‘St. John’. These cultivars and their progeny were used as parents primarily for superior fruit quality. Selection for fruit quality has led to the intensive use of relatively few cultivars and a restriction in freestone peach germplasm. Future progress in the development of high quality, cold hardy, disease- and insect-resistant cultivars will depend upon expansion of the germplasm base, and identification and interfusion of genes conferring desired tree and fruit characters into existing eastern United States peach germplasm.

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Hadidi, A., L. Giunchedi, A. M. Shamloul, C. Poggi-Pollini, and M. A. Amer. "Occurrence of Peach Latent Mosaic Viroid in Stone Fruits and Its Transmission with Contaminated Blades." Plant Disease 81, no. 2 (February 1997): 154–58. http://dx.doi.org/10.1094/pdis.1997.81.2.154.

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Peach latent mosaic viroid (PLMVd) is widely distributed (approximately 55%) in peach germplasm from Europe, Asia, North America, and South America. PLMVd, or a closely related viroid, was occasionally detected in cherry, plum, and apricot germplasm from countries in Europe or Asia. The cherry isolate of PLMVd is 337 nucleotides in length and is 91 to 92% homologous to PLMVd isolates from peach. Molecular hybridization experiments demonstrated that PLMVd is not related to the agent of peach mosaic disease. PLMVd was readily transmitted (50 to 70%) by contaminated blades to green shoots and lignified stems of peach GF-305 plants. These results indicate that the viroid may be transmitted in orchards with contaminated pruning equipment.

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Mas-Gómez, Jorge, Celia M. Cantín, María Á. Moreno, Ángela S. Prudencio, Mar Gómez-Abajo, Luca Bianco, Michela Troggio, Pedro Martínez-Gómez, Manuel Rubio, and Pedro J. Martínez-García. "Exploring Genome-Wide Diversity in the National Peach (Prunus persica) Germplasm Collection at CITA (Zaragoza, Spain)." Agronomy 11, no. 3 (March 5, 2021): 481. http://dx.doi.org/10.3390/agronomy11030481.

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Peach (Prunus persica (L.) Batsch) is one of the most produced and studied stone fruits. Many genetic and genomic resources are available for this species, including a high-quality genome. More recently, a new high-density Illumina peach Single Nucleotide Polymorphism (SNP) chip (9+9K) has been developed by an international consortium as an add-on to the previous 9K array. In the current study, this new array was used to study the genetic diversity and population structure of the National Peach Germplasm Collection of the Agrifood Research and Technology Centre of Aragon (CITA), located in Zaragoza (northern Spain). To accomplish this, 90 peach accessions were genotyped using the new peach SNP chip (9+9K). A total of 9796 SNPs were finally selected for genetic analyses. Through Identity-By-Descent (IBD) estimate analysis, 15 different groups with genetically identical individuals were identified. The genetic diversity and population structure elucidated a possible exchange of germplasm material among regions, mainly in the northern regions of Spain. This study will allow for more efficient management of the National Peach Germplasm Collection by classifying valuable individuals for genetic diversity preservation and will benefit forthcoming Genome-Wide Association Studies (GWAS) of commercially important fruit traits in peach.

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Hu, D., Z. Zhang, X. Zhang, and Q. Zhang. "THE GERMPLASM PRESERVATION OF ORNAMENTAL PEACH CULTIVARS." Acta Horticulturae, no. 620 (December 2003): 395–402. http://dx.doi.org/10.17660/actahortic.2003.620.50.

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Atagul, Omer, Alejandro Calle, Gizem Demirel, John M. Lawton, William C. Bridges, and Ksenija Gasic. "Estimating Heat Requirement for Flowering in Peach Germplasm." Agronomy 12, no. 5 (April 22, 2022): 1002. http://dx.doi.org/10.3390/agronomy12051002.

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Bloom date (BD) in peach is determined by the dynamic relationship between chilling (CR) and heat requirement (HR) fulfilment during dormancy. Understanding these thermal requirements would enable breeders to adapt new cultivars to variable climates. Among the three traits, HR is the least investigated, with the genetic variability in peach germplasm and interaction between HR, CR and BD still mostly unknown. Therefore, we investigated the HR of 136 peach cultivars over 8 growing seasons (2014–2021) by calculating the growing degree hours (GDH) from the moment their CR was satisfied until full bloom. The HR ranged from 1362 to 10,348 GDH across years and cultivars, with cultivar HR eight-year having the best linear unbiased prediction (BLUP) values from 4808 to 7721 GDH. In addition, a high positive correlation between BD and CR, a negative correlation between CR and HR and a seasonal effect on the correlation between BD and HR were observed. Moreover, simulating HR with different threshold base temperatures (Tb) revealed different trends of GDH accumulation, suggesting that genotype-specific Tb should be determined to allow precise discrimination of this requirement. Peach germplasm showed high variation in HR that could be used in breeding for bloom delay to adapt to different environments and climate change.

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Warburton, Marilyn L., and Fredrick A. Bliss. "Genetic Diversity in Peach (Prunus persica L. Batch) Revealed by Randomly Amplified Polymorphic DNA (RAPD) Markers and Compared to Inbreeding Coefficients." Journal of the American Society for Horticultural Science 121, no. 6 (November 1996): 1012–19. http://dx.doi.org/10.21273/jashs.121.6.1012.

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Previous studies of peach germplasm using pedigree information and isozyme polymorphism data have shown limited diversity in the U.S. gene pool. To further investigate the genetic diversity among peach cultivars grown in different regions of the United States, 94 RAPD markers were used to estimate the genetic distances among 136 cultivars. Of the 12 clusters formed in a dendrogram, the 90 U.S. cultivars and breeding lines and most of those from Europe and Latin America grouped to only three clusters, while the 23 peach entries from India, Pakistan, Russia, Okinawa, and China, as well as the almond cultivar used as an outgroup, were distributed among the other nine clusters. Therefore, the genetic diversity within temperate U.S. peach germplasm is quite limited, and to expand the variability, additional germplasm should be obtained, especially from Asia. Comparison of genetic similarity based on inbreeding coefficients with similarity coefficients based on the RAPD data produced a correlation of 0.395, which is comparable to values in similar investigations in other crops. Thus, similar conclusions can be drawn from these two sources of information. RAPD data are useful particularly when pedigree information is incomplete, there has been substantial selection within breeding populations, and a high proportion of alleles are identical in state but not by descent.

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Ledbetter, Craig A., and Elizabeth E. Rogers. "Differential Susceptibility of Prunus Germplasm (Subgenus Amygdalus) to a California Isolate of Xylella fastidiosa." HortScience 44, no. 7 (December 2009): 1928–31. http://dx.doi.org/10.21273/hortsci.44.7.1928.

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Seedling peach (Prunus persica Batsch) and clonal peach–almond hybrids are popular rootstock choices for commercial almond growers in California. In this study, clonal replicates of peach and almond [P. dulcis (Mill.) D.A. Webb] rootstock germplasm and a first-generation peach–almond hybrid created from them were challenged with Xylella fastidiosa isolate M23. Clonal replicates were needle-inoculated with M23 and maintained in a greenhouse environment for a growing season. Typical almond leaf scorch disease symptoms began to develop on M23-inoculated almonds 11 weeks after inoculation. No leaf scorch symptoms were observed on M23-inoculated peach or peach–almond hybrids. Quantitative real-time polymerase chain reaction revealed consistent levels of X. fastidiosa DNA among inoculated almond replicates, whereas X. fastidiosa DNA was undetectable in replicates of peach–almond hybrids. A trace level of X. fastidiosa DNA was detected in a single peach replicate, and statistical analysis demonstrated that this level differed significantly (P < 0.001) from that detected in almond replicates. Selected almonds were further sampled sequentially along their meristematic axes to examine bacterial titer throughout the trees. Selected almond trees differed significantly (P = 0.036) in bacterial titer, but no significant differences were noted in levels of X. fastidiosa from different vertical sections of the main growth axes. The results suggest that peach and peach–almond hybrid rootstock germplasm used by commercial almond tree nurseries in California are not primary inoculum sources for X. fastidiosa-induced diseases.

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Gradziel, T. M., and Dechun Wang. "Evaluation of Brown Rot Resistance and its Relation to Enzymatic Browning in Clingstone Peach Germplasm." Journal of the American Society for Horticultural Science 118, no. 5 (September 1993): 675–79. http://dx.doi.org/10.21273/jashs.118.5.675.

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Rate of brown rot lesion development following inoculation with Monilinia fructicola (Wint.) honey varied within clingstone peach (Prunus persica (L.) Batsch) germplasm evaluated in 1990 and 1991. High levels of resistance were identified in selections derived from the Brazilian clingstone peach cultivar Bolinha. Resistance appeared to be limited to the epidermal tissue. No relation was detected between brown rot resistance and concentration of phenolic compounds or polyphenol oxidase activity in the susceptible California germplasm. An inverse relation was observed between disease severity and rating for phenolic-related discoloration when `Bolinha' derived selections were analyzed. A moderate positive correlation was observed for all germplasm tested between genotype means for phenolic content and enzymatic browning. Any causal relationship, if it exists, between phenolic content and brown rot resistance is obscured by an array of physical and chemical changes in the maturing fruit.

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Alonso, J. M., M. T. Espiau, J. M. Ansón, and M. Carrera. "PEACH GERMPLASM FROM THE EBRO MIDDLE VALLEY IN THE CITA PEACH BREEDING PROGRAMME." Acta Horticulturae, no. 814 (March 2009): 87–90. http://dx.doi.org/10.17660/actahortic.2009.814.7.

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Byrne, David H., and Terry A. Bacon. "Founding Parents of Low-Chill Peaches." HortScience 31, no. 4 (August 1996): 592c—592. http://dx.doi.org/10.21273/hortsci.31.4.592c.

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A computer program was developed to calculate the percent contribution of the founding parents for any given peach or nectarine (Prunus persica) cultivar. The founding parents used most frequently for three low-chill (0 to 500 chill units) peach and nectarine breeding programs (Florida and Pelotas and Campinas, Brazil) were determined. The Florida program used several low-chill honey type peaches (`Hawaiian', `Okinawa') as a source of low chilling and then did extensive crossing with higher quality cultivars developed mainly in the northeastern United States. About 50% of the background of the Brazilian peach releases consists of local selections that were originally brought by the Portuguese explorers. Although each of the Brazilian programs used local peach materials, the local peaches used by each program are different. In addition, the program at Pelotas used germplasm from the Georgia–Florida and New Jersey breeding programs and the Campinas program used `Jewel' (honey peach) and several Florida nectarines (`Sunlite', `Sunred') in their development work. The founding parents among these three programs, although there is some common parentage, are different, and the intercrossing of materials from the various programs would be a useful approach to create more diversity in this germplasm.

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18

_, _. "THE SPANISH FRUIT GERMPLASM NETWORK." HortScience 26, no. 6 (June 1991): 721E—721. http://dx.doi.org/10.21273/hortsci.26.6.721e.

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The Instituto Nacional de Investigaciones Agrarias (INIA) has initiated in 1990 a Fruit Germplasm Project. The diversity of climates in Spain has made recommendable to scatter the different basic collections in different places, taking as a starting point the collections already existing at the different regional research centers across Spain. The species included in the Project are: almond, apple, apricot, banana, cherimoya, cherry, grape, hazelnut, mango, olive, peach, pear, prune and walnut. Details on these collections, their curators and the locations will be presented on the poster.

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Paunovic, S. A., and A. S. Paunovic. "INVESTIGATION OF PEACH GERMPLASM (PRUNUS PERSICA SSP. VULGARIS = VINEYARD PEACH) IN SITU IN YUGOSLAVIA." Acta Horticulturae, no. 374 (October 1996): 201–7. http://dx.doi.org/10.17660/actahortic.1996.374.28.

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Navarro, A., R. Giménez, C. M. Cantín, P. J. Martínez-García, J. Val, and M. A. Moreno. "Chilling injury in local and modern peach cultivars from a Spanish peach bank germplasm." Acta Horticulturae, no. 1352 (December 2022): 237–44. http://dx.doi.org/10.17660/actahortic.2022.1352.32.

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Ma, R., M. Yu, P. Du, H. Guo, and H. Song. "EVALUATION OF GERMPLASM RESOURCES AND BREEDING OF FLAT PEACH." Acta Horticulturae, no. 620 (December 2003): 161–67. http://dx.doi.org/10.17660/actahortic.2003.620.16.

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Wang, Lirong, Gengrui Zhu, and Weichao Fang. "PEACH GERMPLASM AND BREEDING PROGRAMS AT ZHENGZHOU IN CHINA." Acta Horticulturae, no. 592 (November 2002): 177–82. http://dx.doi.org/10.17660/actahortic.2002.592.25.

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Fernández M., M. R., C. Mondragón J., and S. Peréz G. "PEACH GERMPLASM CONSERVATION AND CHARACTERIZATION IN MEXICAN SUBTROPICAL ECOSYSTEMS." Acta Horticulturae, no. 592 (November 2002): 69–72. http://dx.doi.org/10.17660/actahortic.2002.592.7.

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Abdelghafar, A., K. Gasic, and G. Reighard. "Antioxidant capacity and phytochemical content of modern peach germplasm." Acta Horticulturae, no. 1172 (September 2017): 133–36. http://dx.doi.org/10.17660/actahortic.2017.1172.25.

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Pérez-Gonzalez, S. "IMPORTANCE OF BRAZILIAN PEACH GERMPLASM FOR THE MEXICAN SUBTROPICS." Acta Horticulturae, no. 565 (November 2001): 75–78. http://dx.doi.org/10.17660/actahortic.2001.565.11.

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Beckman, T. G., W. R. Okie, A. P. Nyczepir, P. L. Pusey, and C. C. Reilly. "Relative Susceptibility of Peach and Plum Germplasm to Armillaria Root Rot." HortScience 33, no. 6 (October 1998): 1062–65. http://dx.doi.org/10.21273/hortsci.33.6.1062.

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Nearly 5000 seedling trees representing more than 100 peach [Prunus persica (L.) Batsch.] and plum (Prunus spp.) lines were planted at a 4 × 0.6-m spacing in Jan. 1983, on a site with a known history of peach tree short life (PTSL) and Armillaria root rot (ARR). Trees were arranged in a randomized complete-block with eight replicates of six trees each. Beginning in Spring 1984 and each year thereafter the cause of tree death was determined. At the end of 9 years, 50% of the trees had succumbed to PTSL and 35% had been killed by ARR apparently caused by Armillaria tabescens. Analysis of the data for trees killed by ARR showed a wide range in mortality, some peach lines appeared significantly more tolerant to ARR than others. Plum lines derived from native North American species also appeared to be a potential source of improved tolerance. We did not establish whether ARR tolerance is affected by PTSL.

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Kardam, Vinay Kumar, Arti Shukla, D. P. Sharma, and Naveen Kumar. "Screening of germplasm of peach and nectarines against Taphrina deformans." Indian Phytopathology 74, no. 3 (March 27, 2021): 831–33. http://dx.doi.org/10.1007/s42360-021-00340-4.

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Miles, N. W., A. M. Svircev, C. Chong, and A. R. Biggs. "CYTOSPORA CANKER RESISTANCE IN PEACH: GERMPLASM EVALUATION AND GENETIC IMPROVEMENT." Acta Horticulturae, no. 254 (October 1989): 85–90. http://dx.doi.org/10.17660/actahortic.1989.254.13.

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Liu, L., Y. He, B. Dong, F. Han, Y. X. Wu, and J. B. Tian. "REVIEW OF THE PEACH GERMPLASM RESOURCES AND BREEDING IN CHINA." Acta Horticulturae, no. 940 (December 2012): 187–92. http://dx.doi.org/10.17660/actahortic.2012.940.24.

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Van Der Heyden, C. R., P. Holford, and G. D. Richards. "A New Source of Peach Germplasm Containing Semi-freestone Nonmelting Flesh Types." HortScience 32, no. 2 (April 1997): 288–89. http://dx.doi.org/10.21273/hortsci.32.2.288.

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A freestone, nonmelting flesh peach would offer the opportunity to transport freestone peaches to distant markets, and so open lucrative export opportunities. Peach [Prunus persica (L.) Batsch.] germplasm segregating for semi-freestone and clingstone has been identified among the nonmelting flesh, open-pollinated progeny of the Univ. of Florida selection, Fla. 9-20C. The segregation approached a 1 : 1 ratio. No significant differences were detected between the two categories for titratable acidity, soluble solids concentration, or skin color. However, the semi-freestone progeny had significantly softer flesh than their clingstone siblings, although not soft enough to justify reclassification of the flesh texture. No simple genetic model can be proposed for the inheritance of this new phenotype. The semi-freestone, nonmelting germplasm represents a step towards a less perishable, freestone cultivar for the fresh market, as well as an opportunity to study the reason for the rarity of the freestone/nonmelting phenotype among peaches.

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Jiang, Quan, Qiang Xu, Junfeng Pan, Xiaohong Yao, and Zhongping Cheng. "Impacts of Chronic Habitat Fragmentation on Genetic Diversity of Natural Populations of Prunus persica in China." Plants 11, no. 11 (May 30, 2022): 1458. http://dx.doi.org/10.3390/plants11111458.

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Wild peach is an important resource for improving existing peach varieties. However, the extant populations of wild peach show fragmented distribution due to human disturbance and geographic isolation. In this study, we used natural populations (or wild populations) of Prunus persica (Rosaceae) to assess the genetic effects of habitat fragmentation. A total of 368 individuals sampled from 16 natural populations were analyzed using 23 polymorphic simple sequence repeat (SSR) markers. Prunus persica maintained low within-population genetic variation and high level of genetic differentiation. Two genetic clusters were revealed based on three different methods (UPGMA, PCoA, and STRUCTURE). All populations showed a significant heterozygosity deficiency and most extant populations experienced recent reduction in population size. A significant isolation by distance (IBD) was observed with Mantel’s test. Compared to historical gene flow, contemporary gene flow was restricted among the studied populations, suggesting a decrease in gene flow due to habitat fragmentation. Habitat fragmentation has impacted population genetic variation and genetic structure of P. persica. For breeding and conservation purpose, collecting as many individuals as possible from multiple populations to maximize genetic diversity was recommended during the process of germplasm collection. In addition, populations from central China had higher genetic diversity, suggesting these populations should be given priority for conservation and germplasm collection.

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Engel, P., A. Sartori, M. Terlizzi, A. Di Cintio, D. Bevilacqua, F. R. De Salvador, G. Cipriani, and M. A. Palombi. "DATA MINING IN THE ITALIAN PEACH GERMPLASM DATABASE: A PRELIMINARY ANALYSIS." Acta Horticulturae, no. 1084 (May 2015): 241–48. http://dx.doi.org/10.17660/actahortic.2015.1084.34.

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Gasic, K., G. Reighard, W. Okie, J. Clark, T. Gradziel, D. Byrne, C. Peace, T. Stegmeir, U. Rosyara, and A. Iezzoni. "BACTERIAL SPOT RESISTANCE IN PEACH: FUNCTIONAL ALLELE DISTRIBUTION IN BREEDING GERMPLASM." Acta Horticulturae, no. 1084 (May 2015): 69–74. http://dx.doi.org/10.17660/actahortic.2015.1084.7.

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34

Wünsch, A., M. Carrera, and J. I. Hormaza. "Molecular Characterization of Local Spanish Peach [Prunus persica (L.) Batsch] Germplasm." Genetic Resources and Crop Evolution 53, no. 5 (August 23, 2005): 925–32. http://dx.doi.org/10.1007/s10722-004-6697-5.

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35

Perez-Gonzalez, S., and J. C. Merlin. "PEACH GERMPLASM EVALUATION AND CONSERVATION AT HIGH ALTITUDES IN CENTRAL MEXICO." Acta Horticulturae, no. 565 (November 2001): 59–62. http://dx.doi.org/10.17660/actahortic.2001.565.8.

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Nikolić, D., V. Rakonjac, D. Milatović, and M. Fotirić. "Multivariate analysis of vineyard peach [Prunus persica (L.) Batsch.] germplasm collection." Euphytica 171, no. 2 (September 19, 2009): 227–34. http://dx.doi.org/10.1007/s10681-009-0032-3.

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Zaracho, Nathalia, Gemma Reig, Naveen Kalluri, Pere Arús, and Iban Eduardo. "Inheritance of Fruit Red-Flesh Patterns in Peach." Plants 12, no. 2 (January 14, 2023): 394. http://dx.doi.org/10.3390/plants12020394.

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Fruit color is an important trait in peach from the point of view of consumer preference, nutritional content, and diversification of fruit typologies. Several genes and phenotypes have been described for peach flesh and skin color, and although peach color knowledge has increased in the last few years, some fruit color patterns observed in peach breeding programs have not been carefully described. In this work, we first describe some peach mesocarp color patterns that have not yet been described in a collection of commercial peach cultivars, and we also study the genetic inheritance of the red dots present in the flesh (RDF) and red color around the stone (CAS) in several intra- and interspecific segregating populations for both traits. For RDF, we identified a QTL at the beginning of G5 in two intraspecific populations, and for CAS we identified a major QTL in G4 in both an intraspecific and an interspecific population between almond and peach. Finally, we discuss the interaction between these QTLs and some other genes previously identified in peach, such as dominant blood flesh (DBF), color around the stone (Cs), subacid (D) and the maturity date (MD), and the implications for peach breeding. The results obtained here will help peach germplasm curators and breeders to better characterize their plant materials and to develop an integrated system of molecular markers to select these traits.

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Chang, L. S., A. Iezzoni, G. Adams, and G. S. Howell. "Leucostoma persoonii Tolerance and Cold Hardiness among Diverse Peach Genotypes." Journal of the American Society for Horticultural Science 114, no. 3 (May 1989): 482–85. http://dx.doi.org/10.21273/jashs.114.3.482.

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Abstract Open-pollinated progeny from 15 peach (Prunus persica) cultivars, two peach × P. kansuensis hybrids, and one peach almond (P. amygdalus) hybrid were evaluated for their cold hardiness and for tolerance to Cytospora canker following artificial inoculation with Leucostoma persoonii. Winter hardiness was negatively correlated with canker necrotic length (r = −0.26**) and positively correlated with canker rating (r = 0.26**), as indicated by qualitative ratings. The half-sib families differed for canker necrotic length following fall inoculation, indicating that individuals with increased tolerance to L. persoonii canker could be selected from the population. Progeny from the cultivar Yennoh exhibited the shortest canker necrotic length following fall inoculation, and all the inoculated branches were visually healthy. ‘Yennoh’, a plant introduction from Russia, may have a higher tolerance to Leucostoma than has previously been found in U.S. germplasm.

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Hao, Fengge, Lirong Wang, Ke Cao, Xinwei Wang, Weichao Fang, Gengrui Zhu, and Changwen Chen. "Systemic Acquired Resistance Induced by Agrobacterium tumefaciens in Peach and Differential Expression of PR1 Genes." HortScience 50, no. 5 (May 2015): 666–72. http://dx.doi.org/10.21273/hortsci.50.5.666.

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Crown gall disease caused by Agrobacterium tumefaciens affects a wide range of horticultural plants, and has no effective treatment. During the evaluation of crown gall resistance of peach germplasm resources, we observed enhanced resistance to subsequent invasion that was activated by virulence of A. tumefaciens in two peach cultivars. To further verify the phenotype observed in field experiments, systemic acquired resistance (SAR)-related salicylic acid (SA) and PR1 genes were investigated. The levels of SA were elevated in two cultivars, and these high levels were maintained for 35 days postinoculation. Compared with mock-inoculated controls, eight of the 22 candidate PpPR1 genes in A. tumefaciens-inoculated samples were significantly upregulated and three were downregulated in response to inoculation with A. tumefaciens. These data suggested that SA-induced SAR was activated in two peach cultivars by virulent A. tumefaciens infection. In addition, the eight induced PpPR1 genes can be used as molecular markers in defense studies in peach.

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Okie, W. R., G. L. Reighard, T. G. Beckman, A. P. Nyczepir, C. C. Reilly, E. I. Zehr, W. C. Newall, and D. W. Cain. "Field-screening Prunus for Longevity in the Southeastern United States." HortScience 29, no. 6 (June 1994): 673–77. http://dx.doi.org/10.21273/hortsci.29.6.673.

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Long-term field trials of a wide range of peach [Prunus persica (L.) Batsch] germplasm on two peach tree short-life (PTSL) sites revealed marked differences in survival among lines. Generally, cuttings and seedlings of a given line performed similarly, as did ungrafted seedlings and their counterparts grafted to a commercial cultivar. No apparent relationship existed between a line's chilling requirement and survival. B594520-9 survived best in Georgia and South Carolina, providing significantly greater longevity than Lovell, the standard rootstock for use on PTSL sites. B594520-9 is derived from root-knot-nematode-resistant parentage, and progeny of surviving seedlings have demonstrated root-knot resistance similar to Nemaguard seedlings.

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Zhang, Xianan, Mingshen Su, Jihong Du, Huijuan Zhou, Xiongwei Li, Xin Li, and Zhengwen Ye. "Comparison of Phytochemical Differences of the Pulp of Different Peach [Prunus persica (L.) Batsch] Cultivars with Alpha-Glucosidase Inhibitory Activity Variations in China Using UPLC-Q-TOF/MS." Molecules 24, no. 10 (May 22, 2019): 1968. http://dx.doi.org/10.3390/molecules24101968.

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In order to fully understand the variation of the fruit alpha-glucosidase inhibitory activity-related phytochemical basis in the Chinese peach [Prunus persica (L.) Batsch], mature fruit from 33 cultivars was used for the investigation of fruit phenolic phytochemical attributes, including total phenolics, flavonoids, anthocyanins, and procyanidins, as well as the alpha-glucosidase inhibitory activity in vitro. Alpha-glucosidase inhibitory activity varied significantly among tested peach cultivars and was strongly correlated with total phenolics, total procyanidins, and total flavonoids. Untargeted UPLC-Q-TOF/MS-based metabolomics were used to comprehensively discriminate between peaches with different inhibitory activity on alpha-glucosidase. Principal component analysis (PCA) and orthogonal partial least squares discrimination analysis (OPLS-DA) were used for this process. Twenty-three differential compounds were identified between peach cultivars with high and low alpha-glucosidase inhibitory activity, and nine, including procyanidin C1, procyanidin trimer isomer 1, procyanidin trimer isomer 2, procyanidin B1, procyanidin dimer, epicatechin-epicatechin-epicatechin, phloridzin, kaempferol 3-(2’’,6’’-di-(E)-p-coumarylglucoside), and luteolin 3’-methyl ether 7-malonylglucoside, were identified as marker compounds responsible for the discrimination. Overall, variations in metabolites in peach pulp reflect the diversity in peach germplasm, and these nine compounds are good candidate markers for future genetic breeding of peach fruit with high alpha-glucosidase inhibitory activity.

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Brown, Allan F., Gad G. Yousef, Ivette Guzman, Kranthi K. Chebrolu, Dennis J. Werner, Mike Parker, Ksenija Gasic, and Penelope Perkins-Veazie. "Variation of Carotenoids and Polyphenolics in Peach and Implications on Breeding for Modified Phytochemical Profiles." Journal of the American Society for Horticultural Science 139, no. 6 (November 2014): 676–86. http://dx.doi.org/10.21273/jashs.139.6.676.

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The objective of this study was to examine the relative impact of genetics and environment on phenolic and carotenoid profiles in peach (Prunus persica) germplasm. Fully mature, (“ready-to-eat” stage) firm fruit of peach cultivars China Pearl, Contender, and Carolina Gold were collected from established trees at two North Carolina locations in 2009 and 2010. Advanced breeding selections NC Yellow and NC 97-48 were collected from a single location in both years. Using tandem extractions and chromatography analyses, 10 carotenoids and 24 phenolic compounds were quantified separately in the peel and flesh. Statistically significant differences were noted among peach cultivars and advanced selections for β-carotene, cyanidin-3-glucoside, cyanidin-3-rutinoside, cholorogenic acid, quercetin-3-glucoside, and individual procyanidins. Peel anthocyanin (ANC) concentration ranged from 183 mg/100 g in ‘Contender’ to non-detectable levels in NC97-48 and NC Yellow. ‘China Pearl’ and ‘Carolina Gold’ produced ANC levels approximately half of ‘Contender’. Chlorogenic acid concentration also fit a discrete pattern of accumulation but was not related to the accumulation of ANC. ‘China Pearl’, NC 97-48, and NC Yellow contained the highest levels of chlorogenic acid (105 to 136 mg/100 g), ‘Carolina Gold’ contained the lowest (52 mg/100 g), and ‘Contender’ represented an intermediate phenotype (70 mg/100 g). Statistically significant genetic variation was found for almost all compounds identified, whereas location and year effects tended to be compound-specific. For chlorogenic acid, 28% of the phenotypic variance was explained by location (year = nonsignificant), whereas 40% of the phenotypic variation of ANC was explained by differences in years (location = nonsignificant). Analyzing fruit from the same environment over 2 years or from two locations in the same year would not have adequately accounted for the variation associated with environment. The detailed phytochemical profile of peach reported here demonstrates the importance of multiyear, multilocation analysis in revealing accurate measures of phytochemical genetic variation and provides a comprehensive baseline analysis of phytochemicals in commonly grown peach cultivars that can be used to evaluate novel germplasm.

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Kramer, Yasmin Verçosa, Charles Roland Clement, Josiane Celerino de Carvalho, Andreia Varmes Fernandes, Carlos Vinicius Azevedo da Silva, Hector Henrique Ferreira Koolen, Jaime Paiva Lopes Aguiar, et al. "Understanding the Technical-Scientific Gaps of Underutilized Tropical Species: The Case of Bactris gasipaes Kunth." Plants 12, no. 2 (January 11, 2023): 337. http://dx.doi.org/10.3390/plants12020337.

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The extraction and commercialization of palm hearts is the most profitable activity involving the peach palm (Bactris gasipaes), while consumption of its fruits is limited to Amazonian communities. The excessive attention paid to the implementation of germplasm banks contributed to the lack of development of high-performance varieties, limiting the production and consumption of peach palm fruits and by-products. In addition, with the fragmentation of the Amazonian rainforest, wild populations are in danger of extinction. The species domestication, initiated by Native Amazonians, generated a large variety of peach palm populations, as evidenced by the diversity in fruit sizes and quality. Some advances in agronomic traits also took place. However, more research needs to be conducted to understand the implications of climatic changes on plant physiological performance. Indeed, the key point is that the exploitation of the full potential of B. gasipaes has not been completely exploited. Therefore, understanding the state-of-the-art research on the peach palm with a focus on its underutilized resources is essential for expanding plantations and, consequently, promoting the market expansion of the peach palm as a fruit crop.

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Chang, L. S., A. F. Iezzoni, G. C. Adams, and F. W. Ewers. "Hydraulic Conductance in Susceptible versus Tolerant Peach Seedlings Infected with Leucostoma persoonii." Journal of the American Society for Horticultural Science 116, no. 5 (September 1991): 831–34. http://dx.doi.org/10.21273/jashs.116.5.831.

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Eight open-pollinated peach families [Prunus persica (L.) Batsch] were selected from a germplasm collection that was screened for tolerance to Leucostoma persoonii (Nits.) Höhn. [imperfect state, .Leucocytospora leucostoma (Pers.) Höhn] following field inoculation. The eight peach families were either susceptible or tolerant to L. persoonii infection based on canker length measurements. Three open-pollinated seedlings per family were chosen for evaluation. Following artificial inoculation, measurements of hydraulic conductance per pressure gradient (Kh) were made on 2-year-old branch segments from the 24 seedlings, and safranin dye was used to mark the conductive xylem pathways. For the peach families tolerant to L. persoonii, the specific Kh of the canker branch segments was greater than that for the most susceptible peach families. The inoculated branch segments from the tolerant peach families maintained ≈15% to 30% of the water transport of control segments. Safranin dye movement indicated that the sapwood in inoculated branch segments of seedlings from the susceptible peach families was almost completely blocked. Isolation experiments indicated deeper penetration of the fungus into the xylem of seedlings of susceptible than tolerant families. Xylem dysfunction appears to be correlated with a reduction in Kh, and the seedlings in the tolerant peach families are better able to maintain water transport through the stem segment invaded by the fungus.

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Da Silva Linge, C., I. Pacheco, L. Rossini, D. Bassi, S. Foschi, G. Chietera, S. Biffani, and M. Lama. "GENETIC VARIABILITY AND POPULATION STRUCTURE OF PEACH ACCESSIONS FROM MAS.PES GERMPLASM BANK." Acta Horticulturae, no. 1084 (May 2015): 233–39. http://dx.doi.org/10.17660/actahortic.2015.1084.33.

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Chauhan, Akriti, Krishan Kumar, Dinesh Singh, and RK Dogra. "Characterization of Peach [Prunus persica (L.) Batsch] Germplasm Using UPOV Test Gudielines." Indian Journal of Plant Genetic Resources 34, no. 3 (2021): 475–82. http://dx.doi.org/10.5958/0976-1926.2021.00042.5.

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Arús, P., M. J. Aranzana, and J. Carbó. "SSR AND AFLP MARKERS FOR GERMPLASM EVALUATION AND CULTIVAR IDENTIFICATION IN PEACH." Acta Horticulturae, no. 606 (May 2003): 35–40. http://dx.doi.org/10.17660/actahortic.2003.606.5.

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Cristo-Araújo, Michelly de, Doriane Picanço Rodrigues, Spartaco Astolfi-Filho, and Charles R. Clement. "Peach palm core collection in Brazilian Amazonia." Crop Breeding and Applied Biotechnology 15, no. 1 (March 2015): 18–25. http://dx.doi.org/10.1590/1984-70332015v15n1a3.

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The Peach palm Active Germplasm Bank has abundant genetic diversity in its holdings. Because it is a live collection, maintenance, characterization and evaluation are expensive, restricting its use. One way to promote more efficient use is to create a Core Collection, a set of accessions with at least 70% of the genetic diversity of the full collection with minimal repetition. The available geographic, molecular marker (RAPD) and morphometric information was systematized and the populations were stratified into wild and domesticated. The Core Collection consists of 10% of the entire collection: 31 accessions of landraces, 5 accessions of non-designated populations and 4 accessions of wild populations. The Core has 92% of the molecular polymorphism and 95% of the heterozygosity of the full collection, with minimal divergence between them by molecular variance. The Core is already receiving priority maintenance, which will contribute to long term conservation.

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Cantini, Claudio, Amy F. Iezzoni, Warren F. Lamboy, Manuela Boritzki, and Darush Struss. "DNA Fingerprinting of Tetraploid Cherry Germplasm Using Simple Sequence Repeats." Journal of the American Society for Horticultural Science 126, no. 2 (March 2001): 205–9. http://dx.doi.org/10.21273/jashs.126.2.205.

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The U.S. Department of Agriculture (USDA), Agricultural Research Service (ARS) tetraploid cherry (Prunus L. sp.) collection at Geneva, N.Y., contains ≈75 accessions of sour cherry (P. cerasus L.), ground cherry (P. fruticosa Pall.), and their hybrids. Accurate and unambiguous identification of these accessions is essential for germplasm preservation and use. Simple sequence repeats (SSRs) are currently the markers of choice for germplasm fingerprinting because they characteristically display high levels of polymorphism. Recently SSR primer pairs from sweet cherry (P. avium L.), sour cherry, and peach [(P. persica L. Batsch (Peach Group)] have been reported. Ten SSR primer pairs were tested on 59 tetraploid cherry accessions to determine if they could differentiate among the accessions. Scorable SSR fragments were produced with all primer-accession combinations. The cherry accessions exhibited high levels of polymorphism with 4 to 16 different putative alleles amplified per primer pair. Most of the putative alleles were rare with frequencies <0.05. Heterozygosity values ranged from 0.679 to 1.00, while gene diversity values ranged from 0.655 to 0.906. The primer pairs differentiated all but two of the 59 cherry accessions. Based upon the ability of the SSR data to differentiate the cherry accessions and the high level of gene diversity, we propose that all the tetraploid cherry accessions in the USDA/ARS collection be fingerprinted to provide a mechanism to verify the identity of the individual accessions. The fingerprinting data are available on the World Wide Web (http://www.ars-grin.gov/gen/cherry.html) so that other curators and scientists working with cherry can verify identities and novel types in their collections and contribute to a global database.

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Rodriguez-A., J., W. B. Sherman, R. Scorza, M. Wisniewski, and W. R. Okie. "`Evergreen' Peach, Its Inheritance and Dormant Behavior." Journal of the American Society for Horticultural Science 119, no. 4 (July 1994): 789–92. http://dx.doi.org/10.21273/jashs.119.4.789.

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The evergreen (EVG) peach, first described in Mexico, was used as a parent with deciduous (DE) peaches to develop F1 and F2 hybrid populations in Mexico, Florida, Georgia, and West Virginia. F1 trees were DE and F2 plants segregated 3 DE: 1 EVG. In West Virginia, the most temperate location, the heterozygous class could be distinguished in the first few years of growth by late leaf abscission in the fall. Segregation ratios suggest that the EVG trait is controlled by a single gene, evg, the EVG state being homozygous recessive. Evergreen trees were characterized by insensitivity of shoot tips to daylength and failure of terminal growth to cease growth until killed by low temperature. Lateral buds of EVG trees went dormant in the fall. Deep supercooling occurred in both EVG and DE trees, but it appeared later in EVG trees, was of shorter duration, and occurred to a lesser extent. Evergreen germplasm may be useful in developing peach cultivars for frost-free subtropic and tropical areas. It also presents a useful system for studying dormancy and cold hardiness.

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Journal articles on the topic 'Peach germplasm'

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