玉米耐冷性的数值分类研究

1928年,Sellschop和Salman研究了起源于热带的若干农作物的耐冷性反应,将其分为抗冷类型、中间类型和敏感类型。玉米是喜温作物,玉米种植受温度制约。随玉米耐冷性研究不断深入,运用多因子试验综合评估玉米耐冷性,为选育耐冷玉米品种提供依据。我们研究了8个玉米自交系的52个耐冷特征,结果表明,玉米自交系可分为耐冷性强、中等和弱三种类型。

A NUMERICAL TAXONOMIC STUDY ON MAIZE COLD TOLERANCE

The classification and ordination of eight maize inbreds(52 cold tolerance characters) were made by cluster analysis, principal axes analysis and principal components analysis. The eight maize inbreds were respectively classifed into strong, intermediate and weak cold tolerant types. The correlation analysis of seven main cold tolerance characters provides basis for establishment of a correlative selection index for maize cold tolerance.