摘要
选取26个分类性状,对湖北咸宁的26个桂花品种进行了数量分类.结果如下:选取的26个桂花分类性状不太适合做主成分分析,这说明桂花品种性状变异的多样性及演化的多向性,第1个主成分的贡献率表明花梗有无、花色等性状应成为品种分类的优选性状;比较了类平均法、最远距离法、最近距离法、中心距离法的聚类效果,发现类平均法效果最好;聚类分析表明,四季桂品种群和秋桂类亲缘关系较远;花色、结实对品种分类具有重要意义,相似花色的品种,以及结籽的品种常分别聚合在一起;认为花色等性状的演化应是多途径的,不是简单的单线变化.
Based on 26 charactersracters,30 sweet osmanthus cultivars were studied in numerical taxonmy.The following results were obtained： the 26 charactersracters were not suitable for principal component analysis,and that showed the diversity of variation and evolution of sweet osmanthus cultivars;the first principal component′s contribution rate showed inflorescence pedicel and flower color may be the optimol charactersracters for sweet osmanthus cultivars classification;compared with farthest neighbor method,nearest neighbor method and WPGMA,UPGMA could be the best method for cluster analysis,and the cluster results showed the kinship between the Aisaticus Group cultivars and the cultivars flowering in autumn was far;flower color and seed played important roles in sweet osmanthus cultivars classification,and the cultivars with similar colors,or bearing seeds,usually clustered together.There would be many ways for charactersracters such as flower color′s evolution.
出处
《湖北民族学院学报（自然科学版）》
CAS
2010年第3期289-293,301,共6页
Journal of Hubei Minzu University(Natural Science Edition)
关键词
桂花品种
数量分类
主成分分析
聚类分析
sweet osmanthus cultivars
numerical classification
principal component analysis
cluster analysis
