摘要： 选用20个小麦品种（系），采用典范相关分析方法，分析了小麦冠层结构与产量及其构成因素的相关性。结果表明，产量与其构成因素和植株特性呈显著相关，穗粒数和穗数对产量和单株产量的贡献均较大，干物重和株高对产量的贡献最大；叶长与产量呈显著相关，倒三叶长对产量的影响最大，对单株产量的影响3片叶相近；茎壁厚、节间长与单株产量呈显著相关。产量构成因素与各冠层结构特性均存在显著的典范相关。茎壁厚和节间长与茎粗均相关显著；在叶片特性中，除叶宽与披垂度相关不显著外，其余各组性状间均相关显著。

关键词: 小麦, 冠层结构, 产量, 典范相关分析

Abstract: Using twenty wheat varieties (lines) in this experiment, the correlations between the canopy characteristic and yield with its components were studied by canonical correlation analysis, Results showed that yield was significantly correlated with its components and the plant characteristic; the number of kernels per ear, the number of ears per plant and population exit the biggest effects on the yield. The weight of dry substance and the plant height in plant characteristic exit the biggest effects on the yield. The length of leaf was significantly correlated with the yield; the effect of length of top 3rd leaf was biggest for average yield; the effects of 3 leaves were similar for the grain yield per plant; The yield components were signifficantly canonical correlated with canopy characteristic. The stem diameter were signifficantly correlated with stem wall thickness and length between knots. In canony leaf characters, every two groups exit signifficant correlation except between the leaf width and the degree of spreading.

Key words: Wheat, Canopy structure, Yield, Canonical correlation analysis