高级检索+

湖北夏大豆种质SSR标记的遗传多样性研究

Genetic Diversity Analysis by SSR of Summer Sowing Soybean in Hubei

  • 摘要: 利用SSR标记和系统聚类分析,对92个湖北夏大豆种质进行遗传多样性分析。结果表明,28个SSR位点检测到134个等位变异,每个SSR位点的等位变异范围为2~9个,平均4.78个。鄂西南山区的遗传多样性指数和等位变异数最高,其次为江汉平原区。83.6%以上的遗传差异是由于地区差异引起,表现较高程度的地理分化。系统聚类将92个大豆品种分为3个类群,Ⅰ类和Ⅲ类分别以鄂西南山区品种和江汉平原区品种为主。鄂西南山区和江汉平原区的大豆地方品种表现遗传多样性水平较高。

     

    Abstract: There were more than one thousand soybean(Glycine max(L.) Merr)germplasms in Hubei province.In order to evaluate the genetic diversity of summer sowing soybean landraces from different agricultural divisions of Hubei,we analyzed allelic profiles at 28 simple-sequence repeat(SSR) loci of 92 accessions.The SSR loci produced 134 alleles,and each SSR loci could detect 2 to 9 alleles with an average of 4.78 alleles per loci.The highest averages of both genetic diversity index and alleles were all occurred in southwest division,and second one was Jianghan Plain division.More than 83.6% of total variation was produced by geographical differentiation.By using the cluster analysis with Within-groups Linkage method,92 landraces were classified into three major groups at DNA level.Many landraces from southwest division and Jianghan Plain were clustered in Ⅰand Ⅲ group respectively.It was suggested that the diversity level of soybean landrace from both southwest and Jianghan Plain division were higher than those from other divisions.

     

/

返回文章
返回