CHANGES IN GENETIC CORRELATIONS BY INDEX SELECTION
CHANGES IN GENETIC CORRELATIONS BY INDEX SELECTION
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DOI：
10.1051/gse:19910404
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发表时间：
1991-01-01
影响因子：
4.1
通讯作者：
ITOH, Y
中科院分区：
文献类型：
--
作者：
ITOH, Y
导出了一代指数选择的遗传方差和协方差的变化公式。然后利用该公式在两个简单的案例中讨论了遗传相关性的变化。当指数所涉及的两个性状具有相同的遗传力和相同的权重时，遗传相关的变化总是负的，一般都很大。当对一个性状进行选择时，选择后与另一个性状的遗传相关性趋于零。
A formula expressing changes in genetic variances and covariances by index selection in one generation is derived. Then changes in genetic correlation are discussed in 2 simple cases using that formula. When 2 traits involved in the index have equal heritabilities and equal weights, the change in the genetic correlation is always negative and generally large. When selection is on one trait, the genetic correlation with another trait after selection is inclined toward zero.