高产小麦品种冠层形态结构及其与产量性状的关系

Canopy morphology structure and its correlation with yield characters of high-yield wheat cultivars

在高产栽培条件下,以多穗型、中穗型、大穗型3种类型9个小麦品种为材料,研究了高产小麦品种的冠层形态结构及其与产量性状的关系。结果表明,高产品种与丰产品种相比,冠层结构具有:上三叶较宽、短,叶片较厚、挺,具有相对较小的基角、开张角和披垂度,株型较紧凑,植株较矮(80cm左右),穗下节间和旗叶鞘较长。冠层形态性状与产量及其构成因素的相关分析结果表明,旗叶宽度、比叶重、倾斜角度及穗下节长和叶鞘长是决定产量构成因素和产量的制约性状。

The research was carried out on the canopy morphology structure of high-yield wheat cultivars and correlation analysis between these morphology structure and yield characters of 9 wheat cultivars with different spike types in Guanzhong district of Shaanxi province.The results indicated that canopy morphology structure of high-yield cultivars had following traits:wider,shorter and thicker in the top three leaves,smaller slant degree of the leaves,compacter in plant type,short in plant height,longer in peduncle length and sheath length.Correlation analysis between the canopy morphology characters and the yield characters indicated that the width,specific leaf weight,the slant degree,peduncle length and the sheath length of flag leaf were the restricted characters in deciding yield characters and yield.