摘要
采用42个SSR标记，分析了136份中国黄淮稻区近期育成的中粳水稻品种（系）的遗传差异，发现有33个标记具有多态性，多态性位点共检测到106个等位基因，每个位点2．0—7．0个，平均3．2个。供试品种的基因多样性指数（He）平均值为0．249，变幅为0．171—0．426，遗传多样性较低。供试品种（系）籼粳分化程度（TD）值的分布范围为0．629—0．945，籼粳分化比较彻底，粳稻基因成份高。UPGMA聚类结果表明，利用SSR分子标记可将供试136个粳稻品种（系）与对照籼稻品种分开，粳稻群在遗传距离为0．43处分为2个类群，并可进一步分为多个亚群，聚类结果一定程度上反映了品种（系）间的亲缘关系。
A total of 42 SSR markers were used to study genetic diversity of 136 Japonica varieties bred during the recent thirty years. Of the 42 SSR loci ,33 were polymorphic. All the 33 polymorphic loci revealed a total of 106 alleles. The average number of alleles per locus was 3. 2 with a range from 2 to 7. The genetic diversity index of Nei was 0. 249, varying from 0. 171 to 0. 426. The TD1 value varied from 0. 629 to 0. 945, which indicated the differentiation degree of rice indicajaponica was distinct, and most varieties disintegrated thoroughly between Indica rice and Japonica rice. UPGMA cluster analysis showed that at the genetic distance of 0. 43, 136 cuhivars could be classified into two large groups which could be further classified into several sub-groups. Cluster results reflected the relationships of 136 Japonica varieties.
出处
《江苏农业学报》
CSCD
北大核心
2010年第1期15-21,共7页
Jiangsu Journal of Agricultural Sciences
基金
国家博士后资助项目B类(20060390947)
江苏省博士后资助项目(0501035B)
江苏省农业科技自主创新基金项目(CX08-147)
关键词
粳稻
聚类分析
遗传多样性
微卫星标记
Japonica rice
cluster analysis
ge- netic diversity
SSR marker
