小麦旗叶和芒的遗传及其与产量性状的相关性研究

通过对20个小麦品种（系）的研究表明，旗叶、芒对产量形成影响较大。旗叶、芒具有一定的遗传变异度，旗叶性状遗传力中等，芒遗传力较高。旗叶长、旗叶宽、旗叶面积、穗平均芒长均与穗粒重呈显著正相关；旗叶开张角、披垂度与穗粒重呈显著负相关。旗叶长与开张角、披垂度正相关，旗叶宽与开张角、披垂度负相关。育种中可将旗叶宽作为良好的株型性状加以选择。

Inheritance of Flag Leaf and Awn and Their Correlation with Grain Yield of Wheat

The inheritance of flag leaf and awn and their effects on grain yield were investigated with twenty wheat varieties. The results indicated that the genetic coefficients of variation (GCV) of flag leaf characters were 11.3%-28.3% and the heritabilities (h 2 B) were 67.2%-73.8%;the GCV and h 2 B of awn were 16.8% and 88.8% respectively; the flag leaf length, width, area and mean awn length per spike were found to be significant positive correlation with grain weight per spike, the blade angle and bend degree of flag leaf to be significant negative correlation with grain weight per spike; the flag leaf length was related positively with blade angle and bend degree, the flag leaf width related negatively with blad angle and bend degree. It was suggested that the flag leaf width could be selected as a better plant type character in wheat breeding.