吉林省不同年代大豆品种某些株型性状的演变

对吉林省1923年以来生产上主推的9个大豆品种的产量、叶面积、叶面积指数(LA I) 、叶柄长度、茎直径 和比叶重( SLW)等参数的研究表明:大豆产量、叶面积、叶面积指数(LA I) 、茎直径和比叶重( SLW)随着年代的增 加而增加;老品种的冠层结构呈伞型,新品种的冠层结构呈宝塔型;大豆产量与单株叶面积、叶面积指数(LA I)和茎 直径呈显著相关( P≤0. 05) ,株型可以作为大豆高产、高光效育种的重要依据。

Study on stature evolution of soybean cultivars in Jilin province

The nine soybean cultivars planted popularly from 1923 to 2000 in Jilin province were studied.The results as follows :(1)Grain yield,leaf area,leaf area index,stem diameter and specific leaf weight increased with the years of release.(2)The canopy of old cultivars was shaped as an umbrella,however,the canopies of modern cultivars showed a pagoda shapes.(3)Some indexes of stature correlated positively with soybean yield,for example,correlation coefficients of leaf area,leaf area index,stem diameter and yields are significant at 0.05 level.The results indicate that it is reasonable to use plant stature as an important index to improve soybean yield.