EVOLUTION OF DOMINANCE UNDER FREQUENCY-DEPENDENT INTRASPECIFIC COMPETITION IN AN ASSORTATIVELY MATING POPULATION

Peischl, Stephan; Schneider, Kristan A (2010). EVOLUTION OF DOMINANCE UNDER FREQUENCY-DEPENDENT INTRASPECIFIC COMPETITION IN AN ASSORTATIVELY MATING POPULATION. Evolution, 64(2), pp. 561-582. Wiley 10.1111/j.1558-5646.2009.00839.x

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We study the evolution of higher levels of dominance as a response to negative frequency-dependent selection. In contrast to previous studies, we focus on the effect of assortative mating on the evolution of dominance under frequency-dependent intraspecific competition. We analyze a two-locus two-allele model, in which the primary locus has a major effect on a quantitative trait that is under a mixture of frequency-independent stabilizing selection, density-dependent selection, and frequency-dependent selection caused by intraspecific competition for a continuum of resources. The second (modifier) locus determines the degree of dominance at the trait level. Additionally, the population mates assortatively with respect to similarities in the ecological trait. Our analysis shows that the parameter region in which dominance can be established decreases if small levels of assortment are introduced. In addition, the degree of dominance that can be established also decreases. In contrast, if assortment is intermediate, sexual selection for extreme types can be established, which leads to evolution of higher levels of dominance than under random mating. For modifiers with large effects, intermediate levels of assortative mating are most favorable for the evolution of dominance. For large modifiers, the speed of fixation can even be higher for intermediate levels of assortative mating than for random mating.

Item Type:	Journal Article (Original Article)
Division/Institute:	08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE) > Population Genetics 08 Faculty of Science > Department of Biology > Bioinformatics and Computational Biology
UniBE Contributor:	Peischl, Stephan
Subjects:	500 Science > 570 Life sciences; biology
ISSN:	0014-3820
Publisher:	Wiley
Language:	English
Submitter:	Stephan Peischl
Date Deposited:	25 Sep 2014 11:17
Last Modified:	05 Dec 2022 14:34
Publisher DOI:	10.1111/j.1558-5646.2009.00839.x
Web of Science ID:	000273821700021
URI:	https://boris.unibe.ch/id/eprint/51975