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对大豆主要数量性状进行相关遗传参数的分析，结果表明，单株粒重的直接选择效果较好；分枝数和株高对单株粒重的遗传变异贡献率最大；株高和百粒重对单株粒重的直接作用最大。
The results showed that the direct selection effect of individual grain weight was better; the branch number and plant height contributed the most to the genetic variation of grain weight per plant; The maximum direct effect on grain weight per plant.