Some population genetic models combining artificial and natural selection pressures.
The evolutionary behavior of a diploid population characterized by a trait determined at one or two major loci subject to the combined effects of artificial and natural selection pressures is investigated. A number of different genotypic phenotypic associations are set forth, including additive allelic effects and additive loci effects with a variety of culling programs. Threshold selection schemes as well as culling favoring intermediate phenotypic values are considered. For these formulations results are reported concerning the dynamic progress of the population, a delineation of the numbers and properties of the stable equilibria outcomes, and a discussion of their qualitative and quantitative dependence on the two kinds of selection forces. The level of culling can be used as a control through which natural selection parameters can be estimated.
D000483:Alleles; D005799:Genes, Dominant; D005808:Genes, Recessive; D005828:Genetics, Population; D005838:Genotype; D008954:Models, Biological; D010641:Phenotype; D012641:Selection, Genetic