玉米基因型磷效率的主成分分析

The Principal Components Analysis on Phosphorus Efficiency in Maize Genotypes

在低磷和高磷两个供磷水平下,以32个不同玉米基因型为材料对磷效率性状进行主成分分析。结果表明,前3个主成分累计百分率为88.72%,可以用来表述磷效率性状的全部信息,主成分1为玉米基因型的磷吸收效率因子,主成分2为玉米基因型的磷利用效率因子,主成分3为玉米基因型的相对生长速度因子。根据育种目标筛选出磷吸收效率和磷利用效率都较大的玉米基因型178、7146、488、5003、黄C和7331。

Thirty-two maize genotypes were selected to study P efficiency with principal components analysis under low and high phosphorus application. The main results showed that the contribution ratio of accumulated variance reached 88.72%, 3 principal components reflected character of relative characteristics of P efficiency, the first principal component was a factor of P uptake efficiency, the second principal component was a factor of P utilization efficiency, the third principal component was a factor of relative growth rates. 32 maize genotypes were divided into 4 kinds and selected according to breeding objectives, the maize genotypes with high P uptake efficiency and P utilization efficiency was 178, 7146, 488, 5003, Huang C and 7331.