Effects of disruptive selection on genetic variance
โ Scribed by D. A. Sorensen; W. G. Hill
- Publisher
- Springer
- Year
- 1983
- Tongue
- English
- Weight
- 683 KB
- Volume
- 65
- Category
- Article
- ISSN
- 0040-5752
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๐ SIMILAR VOLUMES
The genetic variance of a quantitative trait decreases under directional selection due to generation of linkage disequilibrium. After a few cycles of selection on individual phenotype, a limit is reached where there is no further reduction in the genetic variance. Bulmer's model is extended to an an
The adequacy of an expression for the withinfamily genetic variance under pure random drift in an additive infinitesimal model was tested via simulation in populations undergoing mass selection. Two hundred or one thousand unlinked loci with two alleles at initial frequencies of 1/2 were considered.
The effect of directional and heterotic selection on the standardized variance of gene frequency (f=ฯ q (2) /ยฏq(1-ยฏq)) has been examined. It has been found that heterotic selection always results in f values lower than those expected due to drift alone. Additive directional selection can result in l