Soybean germplasm pools in Asia revealed by nuclear SSRs
Soybean germplasm pools in Asia revealed by nuclear SSRs
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DOI：
10.1007/s00122-002-1073-3
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发表时间：
2003-02-01
影响因子：
5.4
通讯作者：
Shimamoto, Y
中科院分区：
文献类型：
--
作者：
Abe, J;Xu, DH;Shimamoto, Y
大豆在东亚被驯化，由于对不同环境的适应和饮食文化的多样化，已经建立了各种地方品种。因此，亚洲是重要的大豆种质库。为了评估亚洲大豆群体的遗传结构，我们分析了从14个亚洲国家引进的131份材料的20个SSR位点的等位基因谱。SSR标记平均产生11.9个等位基因，平均基因多样性为0.782。数量化理论III分析和UPGMA聚类分析结果表明，日本和中国种质资源明显不同，说明日本和中国种质资源形成了不同的种质库。韩国的种质资源涉及两个种质库，而大多数来自东南亚和南亚/中亚的种质资源来自中国库。相对较高的遗传多样性和缺乏区域特定的集群在东南亚和南亚/中亚人口表明，大豆在这些地区已被反复和独立的不同中国种质库。研究表明，这两个种质库可以作为外来遗传资源，扩大各自亚洲大豆群体的遗传基础。
Soybean was domesticated in East Asia, where various kinds of landraces have been established as a result of adaptation to different environments and the diversification of food cultures. Asia is thus an important germplasm pool of soybean. In order to evaluate the genetic structure of the Asian soybean population, we analyzed allelic profiles at 20 simple-sequence repeat (SSR) loci of 131 accessions introduced from 14 Asian countries. The SSR loci produced an average of 11.9 alleles and a mean gene diversity of 0.782 in the accessions tested. Quantification theory III analysis and cluster analysis with the UPGMA method clearly separated the Japanese from the Chinese accessions, suggesting that the Japanese and Chinese populations formed different germplasm pools. The Korean accessions were involved in both germplasm pools, whereas most of the accessions from southeast and south/central Asia were derived from the Chinese pool. Relatively high genetic diversity and the absence of region-specific clusters in the southeast and south/central Asian populations suggest that soybean in these areas has been introduced repeatedly and independently from the diverse Chinese germplasm pool. The present study indicates that the two germplasm pools can be used as exotic genetic resources to enlarge the genetic bases of the respective Asian soybean populations.