Abstract
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.
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