SSR分析50份桃种质资源遗传多样性

利用16对SSR引物对不同产地的50份桃种质资源遗传多样性进行分析,结果表明:各位点的多态信息含量(polymorphism information content,PIC)在0.04~0.37,平均值为0.24。依据非加权组平均法聚类分析,50份桃种质资源可主要划分为3个类群(中晚熟种质、中早熟种质、超短低温早熟种质)。在湿热地区综合性状优异的短低温种质可单独聚类。观赏桃与鲜食普通桃亲缘关系最远。遗传分析表明:部分福建地方种质属于南方水蜜桃,从分子水平支持了先前认为这些种质源于江南(江浙沪)水蜜桃品种群的看法。

Genetic Diversity of 50 Prunus persica Germplasms Aanlyzed by SSR Markers

Genetic diversity of 50 Prunus persica germplasms was analyzed using 16 pairs of SSR primers.The results showed that the polymorphism information contents of the individual sites ranged from 0.04 to 0.37 with an average of 0.24.The 50 peach germplasms could be classified into 3 groups according to thecluster analysis of the unweighted pair group method witharithmetic mean.They were medium late-maturing,medium early-maturing and low-temp early-maturing peaches.In addition,the low-temp germplasms with excellent over-all properties in the hot and humid southern regions could be grouped by themselves.The ornamental varieties were genetically far remote from the common peaches.A genetic analysis indicated that some of the local germplasms found in Fujian were typical southern peaches.Thus,from the molecular level,it confirmed the previous understanding of the origin of local varieties to be south of the Yangtze River.