睡莲品种数量分类的初步研究

以《睡莲》中所描述的245个品种中的101个为运算单位,利用SAS统计软件进行了主成分分析和R型聚类分析.结果表明:品种描述所用的16个性状独立性强,其中株型、花径、叶面积和株叶展幅对睡莲分类有重要影响.根据国际法规的规定,系统聚类(离差平方和法)结合快速聚类的结果,又考虑到睡莲品种分类的现状,建议将睡莲分为热带大花睡莲品种群、热带中花睡莲品种群、热带小花睡莲品种群、耐寒小花睡莲品种群、耐寒中花睡莲品种群、耐寒大花睡莲品种群等6个品种群.该框架既符合现在睡莲品种分类方法的内涵,又符合国际法规的形式.

Preliminary Study on the Numerical Classification of Nymphaea tetragona Cultivars

Using 101 Nymphaea tetragona cultivars from 245 cultivars described in Nymphaea tetragona as operational units,then carried through principle componential analysis and R-cluster analysis by statistic software of Spss.The results showed that the 16 characters were independent strongly and the factors such as the plant types,flower diameter,leaf area and the spread of plant occupied the important status in classification.In accordance with international regulations,the results of fastclus analysis and Q-cluster analysis and the status of Nymphaea tetragona category,the authors proposed that Nymphaea tetragona was divided into 6 groups,consisting of large-sized-flower tropical water lilies group,medium-sized-flower tropical water lilies group,Small-sized-flower tropical water lilies group,large-sized-flower hardy water lilies group,Medium-sized-flower hardy water lilies group and small-sized-flower hardy water lilies group.The framework embodies the content of ecological classification,and accord with international regulations in the form.