大豆产量轮回选择主要农艺性状的遗传响应

• 作 者: 盖钧镒 WalterR.Fehr
• 机 构: 南京农业大学大豆遗传育种研究室,衣阿华州立大学农艺系
• 出 处: 作物学报
• 发表日期: 1985年04期
• 关键词: 轮回选择 农艺性状 随机区组试验 优系 亚群体 多元分析 合并分析 自花授粉作物 油分含量 增效基因

本文研究了大豆产量轮回选择下主要农艺性状平均数及遗传方差——协方差的响应。试验数据取自早、中、晚3组的亲本和3个周期在2年2地点的随机区组试验。3组资料合并分析。产量、成熟期、倒伏程度、株高及百粒重五维空间中,产量轮回选择的第一、二周期优系亚群体离亲本的距离显著增加,而初始周期选择便显著改变产量本身,对产量的选择导致延迟成熟,其他性状无定向变化。连续产量轮回选择可能导致遗传变异小量逐步下降,但并不显著,解决这种下降的方法是提高选择的效果。

In this paper, we studied the average number of major agronomic traits and the genetic variance-covariance response under the soybean selection cycle. The experimental data were taken from the parents of the early, middle and late three groups and the randomized block test of three cycles at two years and two locations. 3 groups of data combined analysis. Yield, maturity, lodging, plant height and five-dimensional space of 100-grain weight, the first and second cycles of the first cycle and the second cycle of the excellent cycle subgroups significantly increased from the parents, while the initial cycle selection significantly changed the yield itself. The choice of yield leads to delayed maturity and no change in other traits. Continuous selection of rounds may lead to a small but gradual decline in genetic variation, but not significant. The solution to this decline is to increase the effectiveness of the selection.