Principal factor analysis shows th at the first and the second principal factor can classify genus Glycine into two gr oups which represent subgenus Glycine and subgenus soja. The results of UPGMA indic ate that G.

• SSR等位基因的主成分分析结果表明，大豆属中的Glycine亚属和Soja亚属的分类界限是比较明确的，利用第一主成分和第二主成分可较明显地区分开Glycine亚属和Soja亚属。