摘要
在间作条件下，测定和估算了栽培大豆产量与主要经济性状间的相关、回归、遗传进度和选择指数等遗传参数。结果表明，除百粒重与小区产量呈负向回归和相关外，其余８性状与小区产量均为正向关系。其中主茎节数、株高、开花期、有效分枝数、单株荚数和单株粒数等６个性状与产量间的基因型相关都达显著或极显著水平。而且这些性状对籽粒产量有较大的相关遗传进度（ＣＧＳ′ｙ）。在对产量选择的３种方法中、指数选择优于相关选择和直接选择。在一定范围内，虽然选择指数的遗传进度（ＣＧＳ′ｙ）有随选择因素的增加而提高的趋势，但是在只含２至３个因素的某些简单的综合选择。
The genetic parameters about correlation, regression, genetic gain and selection index were tested and estimated between seeds yield and respective main agronomic characters of soybean (G.max) under intercropping with maize. The results showed that regression and correlation of yield per plot with other 9 characters was positive except that it was negatively related for 100-seed weight. Six of nine characters (number of nodes of main stem, plant height, blooming date, number of effective branches, number of pods per plant, number of seeds per plant), theirs genetic correlation coefficient with yield were significant of highly significant. These characters also caused seed yield of have greater correlation genetic gain (CGS y). Among three selection methods of yield, index selection was advantageous over both correlation selection and direct selection. Although, in certain range, there was improved tendency of genetic gain of selection index (CGS y) along with the increase of number of selective factors, yet in some simple comprehensive selection containing only 2 or 3 factors, both CGS y and selective effect would be as large as multiple factor selection.
出处
《大豆科学》
CAS
CSCD
北大核心
1997年第1期54-59,共6页
Soybean Science
关键词
间作
大豆
经济性状
遗传相关
选择指数
Soybean
Intercropping, Economic chatacter
Cenetic correlation
Genetic gain
Selection index
