冀鲁豫花生育成品种的遗传多样性分析

以冀鲁豫三省不同地域的41个花生育成品种为材料,利用SSR分子标记结合田间表型鉴定、聚类分析等方法对其遗传多样性进行了研究。结果表明,21对SSR引物对41个花生育成品种进行了扫描,共检测到52个等位变异,每个位点2～4个,平均2.5个,Shannon信息指数变幅为0.21～1.40,平均为0.73,聚类分析显示在阈值为5.54可将供试品种分为3大类群7个亚类。不同品种9个农艺性状变异系数在13.16%～186.49%之间,基于农艺性状的聚类分析结果显示在阈值为5.48时可以将供试品种分为6大类群11个亚类,各大类群间品种的农艺性状表现各具特点。

Studies on Genetic Diversity of Peanut (Arachis hypogaea L.) Varieties Bred in Hebei, Shandong and Henan Provinces

Abstract: In order to assess the genetic diversity, 41 peanut varieties bred in Hebei, Henan and Shandong provinces were used with methods of SSR markers, phenotypic identification and cluster analysis. Using 21 pairs of SSR primers, 41 peanut varieties were screened and 52 alleles were detected, with 2~4 alleles per locus and average of 2.5. Shannon information index of varieties ranged from 0.21 to1.40 with an average was 0.73 for each pair of primers. Cluster analysis based on SSR markers showed that 3 groups and 7 subclasses were clustered while threshold was 5.54.The coefficient of variation for nine kinds of agronomic traits were at range of 13.16%~186.49%. And the result of cluster analysis based on agronomic traits showed that these varieties were divided into 6 categories and 11 subclasses when threshold was 5.48. Varieties in each category have their own characters.