摘要
本文研究了大豆种间杂交(G. max×G. gracilis, G. max×G. soja)后代的遗传力、遗传进度。结果表明:种间杂交后代主要农艺性状的遗传规律基本上与栽培种内品种间杂交相类似,可利用类似于处理栽培品种杂交后代的方法处理种间杂交后代;种间杂交后代的遗传进度较大,选择效应明显。
Parents and F1, F2, Bw (backcross to wild parent), Bc (backcross to cultivated parent) generations of two G. max x G. soja crosses and four G, max x G, gracilis crosses were investigated in the present study. The characters studied were protein content, seed weight per plant, number of seeds per plant, 100-seed weight, seeds/(seeds + stems), seed shape index, diameter of main stem, plant height, number of branches per plant, days from emergence to flowering, days from flowering to maturity, days from emergence to maturity. Heritability, genetic advance and selection indexes of the agronomic characters were analysed. High heritability has been found on days from emergence to flowering, days from flowering to maturity, days from emergence to maturity, protein content, 100-seed weight, seed shape index and plant height. Therefore, selection is effective on such characters in early generations. The high genetic advance of the characters studied made it possible to select more effectively. Selection for protein content based on selection index is more effective than that on protein content itself. The inheritance of the studied characters in interspecific crosses was similar to that in intraspecific crosses of cultivated soybeans, so similar methods may be used for handling segregating hybrids of interspecific crosses as and intraspecific crosses of cultivated soybeans.
出处
《大豆科学》
CAS
CSCD
北大核心
1989年第2期123-128,共6页
Soybean Science
关键词
大豆
种间杂交
农艺性状
遗传力
G. soja, G. gracilis G. max Heritablity Genetic advance Selection index
