外引豌豆资源的鉴定及主要数量性状的主成分分析

Principal Component Analysis and Identification of Introduced Pea(Pisum sativum L) Germplasm Resources

研究了15份外引豌豆(Pisum sativum L.)种质资源的主要农艺、经济性状。结果表明,豌豆种质资源具有较高的变异系数,为23.66%-50.25%。豌豆的单株产量与单株分枝数、单株荚数极显著正相关(P<0.01),豌豆资源的始荚节位与主茎节数极显著正相关,且这两个性状都与株高极显著正相关(P<0.01)。8个数量性状综合成为4个主成分,且这4个主成分构成的信息量可解释总信息量的94.79%。选用前4个主成分值计算各种质间的遗传距离,按遗传距离大小在D2=3.57水平下可将15份种质资源聚类划分为5大类群。

The growth period, seed morphological characteristics, and agronomic traits of fifteen introduced pea （Pisum sativum L.） resources were studied. The results showed that pea resources had high coefficient of variation, ranged from 23.66% to 50.25%. The result of correlation showed that seed weight per plant was significantly and positively correlated with number of primary branches and pods per plant （P〈0.01）. Plant height was significantly and positively correlated with first fruiting node and nodes number of the main stem （P〈0.01）. The results of principal component analysis showed that eight quantitative characters were consolidated into four principal components accounted for 94.79% of total variation. The genetic distance was calculated using the value of the first four principal component. The pea resources were divided into 5 groups at the level of D^2=-3.57 based on the value of genetic distance.