摘要
对6个沙棘品种的叶片形态特征进行主成分、聚类和判别分析。结果表明,品种间的叶片形态特征差异达到极显著水平(P<0.01);主成分分析选出了2个主成分,方差累积贡献率达到69.633%,长宽比、叶宽分别是第1、2主成分的主导因子;在聚类分析基础上,用逐步判别分析选出了对沙棘品种叶片形态分类有显著影响的面积、长度、宽度、周长、长宽比及形态因子参数,同时建立了部分变量的1个判别能力较高的判别模型。
The principle component,clustering and judgment analysis were conducted on leaf morphological characteristics about 6 cultivars of Hippophae rhamnoide.The results showed the difference of leaf morphological characteristics is up to extremely significant level(P 0.01);2 principle components were selected,the variance accumulative contribution rate reached 69.633%,length and width ratio and leaf width are the dominant factor of the first,second main components;on the basis of clustering analysis,stepwise discriminate analysis was adopted to select area,length,width,girth,length and width ratio and morphological factor parameters which have significant effects on leaf classification of H.rhamnoide.At the same time,a discrimination model that has higher discriminating power was established.
出处
《安徽农业科学》
CAS
2013年第12期5408-5409,共2页
Journal of Anhui Agricultural Sciences
关键词
沙棘
叶片形态
数学分析
Hippophae rhamnoide
Leaf morphology
Mathematical analysis