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利用九个亲本六个组合的F_2分析了单株蛋白质产量的遗传表现,结果表明,大豆F_2代单株蛋白质产量分布呈正态,此性状由多基因控制,以加性效应为主。因组合不同,单株蛋白质产量的遗传力变化从42.1％到74.16％,遗传进度变化在2.08到3.85之间。F_2代群体存在广泛的遗传变异,有大量的超亲现象,且以正向超亲为普遍,因此,在F_2代进行选择可收到较好的效果。 亲本直接影响到F_2的遗传变异,双亲差异大或亲缘关系远的组合,F_2代有较为丰富的遗传变异,单株籽粒产量与蛋白质产量有极显著的正相关,蛋白质产量与蛋白质含量有显著的负相关关系。
The genetic performance of single plant protein yield was analyzed by F_2 of nine parents. The results showed that the protein yield distribution of F_2 generation plants in soybean was normal, which was dominated by polygenes, with additive effect as the main factor. Due to the different combinations, the heritability of protein yield per plant varied from 42.1% to 74.16%, and the genetic variation was between 2.08 and 3.85. The F_2 generation had extensive genetic variation, a large number of super-progenies, and the positive super-progenitor was widespread. Therefore, the F_2 generation could receive better results. The parents had a direct impact on the genetic variation of F_2, the large differences in parental or distant genetic relationship, and the F2 generation had abundant genetic variation. The grain yield per plant had a significant positive correlation with the protein yield, and the protein yield and protein content were significant Negative correlation.