白花树天然群体表型多样性研究

调查了9个群体的14个表型性状,采用巢式方差分析、变异系数、相关分析和聚类分析等方法,分析了群体间和群体内表型多样性.结果表明:白花树表型性状在群体间和群体内都存在丰富的变异,群体间表型分化系数为59.08％,大于群体内变异；侧枝、叶片、果实和种子4类表型性状的平均变异系数分别为31.02％、16.85％、8.2％和6...

Phenotypic Diversity in Natural Populations of Styrax tonkinensis

14 phenotypes from 9 populations were investigated and the phenotype diversities within and inter-populations were analyzed by adopting the methods of nested analysis of variance, coefficient of variation, correlation analysis and cluster analysis. The results are as follows: The phenotypes of Styrax tonkinensis present abundant variations within populations and groups; the phenotypic differentiation coefficient is 59.08% within populations, which is higher than that within groups; The average coefficient of variation of 4 kinds of phenotypes, collateral, leaves, fruits and seeds, are 31.02%, 16.85%, 8.2% and 6.6% respectively, it appears that seed stability is the highest, while the collateral stability is the lowest; Seed 1000-grain weight has very significant positive correlation with individual traits of collateral, leaves, fruits and seeds, while significantly negative correlation with shape index of leaves, fruits and seeds .Among the 14 phenotypes, only leaf length, leaf area and seed length, seed aspect ratio present one-way variation pattern of latitude and longitude; 9 natural groups of species Styrax tonkinensis could be divided into 3 classes through the clustering analysis of phenotypes.