长江下游大豆地方品种的聚类分析

CLUSTER ANALYSIS OF SOYBEAN LANDRACES IN LOWER VALLEY OF YANGTZE RIVER

采用系统聚类分析中８种不同方法对８６个长江下游大豆地方品种６个推广品种的聚类效果进行了比较．结果表明．离差平方和法（ＷＭ）空间扩张性适中，样本在各类中分布比较均衡，分类结果较好地反映了实际情况。按ＷＭ法进行的聚类分析表明，长江下游大豆地方品种类型及其特点与地理来源存在明显关系，供试地方品种可划归为四个生态区域：江苏新沂河以北地区、江苏长江与新沂河之间地区、苏南区、安徽淮北区。

Eight hierachical clusterins methods were evaluated via 86 soybean landraces and 6 released cuitivars with 15 quantitative traits as materials. The results showed that Ward method (WM) appeared to have moderate space expansion. more uniform sample distribution,and more consistent clustering results with real situation. Thus .WM was a clustering method suitable to soybean varieties. WM clustering results indicated that the tested landraces might be divided into groups from following four ecological regions, northern region of Xinyi River in Jiangsu Province (JSP),region between Yantze River and Xinyi River in JSP,southern region of Yangtze River in JSP,and northern region of Huai River in A nhui Province.