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《Journal of China Agricultural University》 2007-05
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Establishment and evaluation of the core collection of peach (Prunus persica(L.) Batsch.) cultivars

Li Yinxia1,An Lijun1,Jiang Quan2,Zhao Jianbo2,Li Tianhong1 (1.College of Agronomy and Biotechnology,China Agricultural University,Beijing 100094,China;2.Institute of Pomology and Forestry,Beijing Academy of Agriculture and Forestry Sciences,Beijing 100093,China)  
This study was aimed at establishing a core collection based on the analysis of MOR and SSR alleles of the primary core collection data of peach cultivars.The index of genetic diversity,and frequency ratio of retention and loss of alleles were studied in cluster and random samples at 9 sampling ratios.The cluster sampling method preceded random sampling,and cluster sampling of MOR combined with SSR at the sampling ratio of 80% was the best sampling strategy across sampling methods.Based on this sampling strategy,45 accessions were selected as the core collection of peach with the highest index of genetic diversity which retained 100% phenotypic characters and 96.6% alleles of primary core collection.Two alleles were lost at frequencies below 0.05 and all alleles were retained at frequencies between 0.05 and 1.The core collection developed was evaluated by using 6 quantitative traits and the data showed that it can satisfactorily represent the genetic diversity of the original collection of 558 peach accessions.The core collection of peach with a fair representation was established in this study based on pre-determined best sampling strategy.
【Fund】: 新世纪人才支持计划(NCET-06-0108);; 北京地区高等学校学科群建设项目(XK100190553)
【CateGory Index】: S662.1
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