Genotypic Variation for a Quantitative Character Maintained under Stabilizing Selection without Mutations: Epistasis
AUTOR(ES)
Gimelfarb, A.
RESUMO
A model of the gene action on a quantitative character is suggested. The model takes into account epistasis by combining multiplicative with the traditional additive approximation of the action of loci. It is demonstrated on the basis of this model that a high level of genotypic variation can be maintained in a population for a quantitative character under stabilizing selection in the absence of mutations, if there is epistasis. It is also shown that a large amount of additive variation as well as high heritability can be ``hidden'' in such a population and ``released'' if stabilizing selection is relaxed.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1203785Documentos Relacionados
- Additive Variation Maintained under Stabilizing Selection: A Two-Locus Model of Pleiotropy for Two Quantitative Characters
- Pleiotropic Models of Polygenic Variation, Stabilizing Selection, and Epistasis
- Deleterious Mutations, Apparent Stabilizing Selection and the Maintenance of Quantitative Variation
- Rate of evolution of a character without epistasis
- The Quantitative Genetic Consequences of Pleiotropy under Stabilizing and Directional Selection