毛竹若干性状相关性和主成分分析

Correlation and Principle Component Analysis on Several Characteristics of Phyllostachys heterocycla cv.pubescens

通过对毛竹若干性状相关性的研究,为毛竹的系统选育和栽培提供理论依据。结果表明:毛竹性状存在较大变异,RSD最大的性状是10 m处直径,RSD最小的性状是地径壁厚;毛竹各性状间的相关系数一般呈极显著或显著水平,各性状之间存在普遍的相关性;毛竹29个性状根据变量之间差异的大小可分为4类;主成分分析中前两个主成分对变异的贡献率达到85%以上。

The correlations among the several characteristics of Phyllostachys heterocycla cv.pubescens were studied,in order to provide theoretical basis for its breeding and cultivation.Every characteristics varied greatly.The maximum RSD was found in the diameter at the height of 10 metres and the minimum one in basal wall thickness.Generally,the correlation coefficients among various characteristics were significant or highly significant.The 29 characteristics understudy can be clustered into 4 categories according to the differences between them.The contribution rate of the first two principal components accounted for more than 85% of the total variance.