不同类型栽培大豆(G.max)亲本对种间杂种后代影响的研究

EFFECT OF G. MAX PARENTS OF DIFFERENT GROWTH HABIT ON PORFORMANE OF PROGENIES IN G. MAX Ⅱ G. GRACILIS CROSSES

本文对不同结荚习性栽培大豆(G.max)亲本对种间杂种(G.mzx×G.gracilis)后代主要农艺性状的影响进行了研究。结果表明:有限性组合的单株粒重表现最优,无限性组合的株高则优势最强;除有效分枝以外,其余性状有限及亚有限性组合的遗传变异系数均大于无限性组合;有限及亚有限性组合的单株粒重及其主要构成因素的遗传进度,明显地高于无限性组合;选用植株较矮、主茎较粗、百粒重较大的有限和亚有限性栽培大豆作亲本有利于克服种间杂种后代蔓生、籽粒小、主茎细弱等不利性状。

Progenies from 9 crosses between three cultivated soybean ( G. max) with different growth hahit and three semi-wild soybean ( G. gracilis) genotypes were used to study the heterosis, indices of major agronomic characters in F1,and F2 and the means, GCV, s, heritabllities and genetic ad vances of major characters in F2, and to investigate the correlation cofficicnt of major characters between parents and F2 generation.The results showed that heterosis indices of seed yield per plant of determinate crosses were larger than that of semi-determinate and indeterminate crosses. Except number of branches, the GCV. s of all other characters of determinate and semi-determinate crosses were larger than those of indeterminate crosses. In general, the expecict, genetic advances of determinate and semi-determinate crosses were larger than that of indeterminate cosses for most characters studied. Plants of 110cm in height, 350 pode per plant and erect main stem were solated from determinate and sent -determinate crosses.