繁缕和无瓣繁缕六个居群的数值分析

Numerical Analysis of Six Populations of Stellaria media and S.apetala

对繁缕 (Stellariamedia)和无瓣繁缕 (S apetala)的 6个居群的 5 7个性状进行Q -聚类和R -聚类的研究。结果表明 :(1)Q -聚类中 ,用一条结合线 ,可以把繁缕的 4个居群聚为一类 ,无瓣繁缕的 2个居群聚为一类。这一结果支持把繁缕和无瓣繁缕划分为两个物种 ;(2 )R -聚类中 ,发现了呈现完全正相关、极大正相关和极大负相关的性状 ,并根据R-聚类的结果 ,运用一条适当的结合线 ,把繁缕和无瓣繁缕的 5 7个性状划为 5个类群 ,并分析了各性状的分类学意义。

Six populations of Stellaria media and S apetala and their 57 characters have been clustered by means of Q analysis and R analysis.The results show that (1) In Q analysis,4 populations of S media and 2 populations of S apetala can be divided into 2 groups by a combined line.This result supports the opinion that S media and S apetala should be treated as two species. (2) In R analysis,the characters of complete positive correlatio,great positive correlation and great negative correlation have been found.In terms of a combined lines,57 characters are clustered to 5 groups.The taxonomic significance of these characters has also been analyzed.