Evaluation of the genetic diversity of Asian peach accessions using a selected set of SSR markers

A total of 94 peach accessions from the Zhejiang province of China were analyzed using 34 polymorphic single-locus simple sequence repeat (SSR) markers. Genetic distance analysis divided the accessions into two major clusters, one with mainly local accessions from the Fenghua region. Preselected lin...

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Bibliographic Details
Published in:Scientia horticulturae 2010, Vol.125 (4), p.622-629
Main Authors: Xie, Rangjin, Li, Xiongwei, Chai, Mingliang, Song, Lijuan, Jia, Huijuan, Wu, Dajun, Chen, Miaojin, Chen, Keming, Aranzana, Maria Jose, Gao, Zhongshan
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
alleles
Allelic composition
Biological and medical sciences
cultivars
flavor
fruit quality
Fundamental and applied biological sciences. Psychology
Generalities. Genetics. Plant material
Genetic diversity
genetic markers
genetic polymorphism
Genetic resources, diversity
genetic variation
Genetics and breeding of economic plants
heterozygosity
inbreeding
landraces
loci
Melting peach
microsatellite repeats
molecular sequence data
Peach
peaches
Plant material
Prunus persica
SSR
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Summary:A total of 94 peach accessions from the Zhejiang province of China were analyzed using 34 polymorphic single-locus simple sequence repeat (SSR) markers. Genetic distance analysis divided the accessions into two major clusters, one with mainly local accessions from the Fenghua region. Preselected lines from some crosses were exclusively clustered with the local ones, possibly related to maintaining the taste quality of the fruit. The number of alleles per locus at most loci was two or three, with an average of 2.85. The value of observed heterozygosity varied from 0.05 to 0.84 (average of 0.48). Diversity within the introduced accessions was higher than that of the Fenghua local accessions. Of the accessions analyzed in this study, 94% were individually identified. Those that could not be differentiated were all derived from the ‘Yulu’ cultivar, being either mutations or of identical origin. Our results suggest that Fenghua accessions are derived from limited parental materials and inbreeding over a long period of time. They will be useful for breeders to better manage their pre-breeding materials and choice of parents for further crossings.
ISSN:0304-4238
1879-1018
DOI:10.1016/j.scienta.2010.05.015