Evolution of assortative mating in a population expressing dominance.

In this article, we study the influence of dominance on the evolution of assortative mating. We perform a population-genetic analysis of a two-locus two-allele model. We consider a quantitative trait that is under a mixture of frequency-independent stabilizing selection and density- and frequency-de...

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Autores principales:	Kristan A Schneider, Stephan Peischl
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2011
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2030b581e61346c582fcb3a7468cc5ee
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spelling	oai:doaj.org-article:2030b581e61346c582fcb3a7468cc5ee2021-11-18T06:56:18ZEvolution of assortative mating in a population expressing dominance.1932-620310.1371/journal.pone.0016821https://doaj.org/article/2030b581e61346c582fcb3a7468cc5ee2011-04-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21483775/?tool=EBIhttps://doaj.org/toc/1932-6203In this article, we study the influence of dominance on the evolution of assortative mating. We perform a population-genetic analysis of a two-locus two-allele model. We consider a quantitative trait that is under a mixture of frequency-independent stabilizing selection and density- and frequency-dependent selection caused by intraspecific competition for a continuum of resources. The trait is determined by a single (ecological) locus and expresses intermediate dominance. The second (modifier) locus determines the degree of assortative mating, which is expressed in females only. Assortative mating is based on similarities in the quantitative trait ('magic trait' model). Analytical conditions for the invasion of assortment modifiers are derived in the limit of weak selection and weak assortment. For the full model, extensive numerical iterations are performed to study the global dynamics. This allows us to gain a better understanding of the interaction of the different selective forces. Remarkably, depending on the size of modifier effects, dominance can have different effects on the evolution of assortment. We show that dominance hinders the evolution of assortment if modifier effects are small, but promotes it if modifier effects are large. These findings differ from those in previous work based on adaptive dynamics.Kristan A SchneiderStephan PeischlPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 4, p e16821 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kristan A Schneider Stephan Peischl Evolution of assortative mating in a population expressing dominance.
description	In this article, we study the influence of dominance on the evolution of assortative mating. We perform a population-genetic analysis of a two-locus two-allele model. We consider a quantitative trait that is under a mixture of frequency-independent stabilizing selection and density- and frequency-dependent selection caused by intraspecific competition for a continuum of resources. The trait is determined by a single (ecological) locus and expresses intermediate dominance. The second (modifier) locus determines the degree of assortative mating, which is expressed in females only. Assortative mating is based on similarities in the quantitative trait ('magic trait' model). Analytical conditions for the invasion of assortment modifiers are derived in the limit of weak selection and weak assortment. For the full model, extensive numerical iterations are performed to study the global dynamics. This allows us to gain a better understanding of the interaction of the different selective forces. Remarkably, depending on the size of modifier effects, dominance can have different effects on the evolution of assortment. We show that dominance hinders the evolution of assortment if modifier effects are small, but promotes it if modifier effects are large. These findings differ from those in previous work based on adaptive dynamics.
format	article
author	Kristan A Schneider Stephan Peischl
author_facet	Kristan A Schneider Stephan Peischl
author_sort	Kristan A Schneider
title	Evolution of assortative mating in a population expressing dominance.
title_short	Evolution of assortative mating in a population expressing dominance.
title_full	Evolution of assortative mating in a population expressing dominance.
title_fullStr	Evolution of assortative mating in a population expressing dominance.
title_full_unstemmed	Evolution of assortative mating in a population expressing dominance.
title_sort	evolution of assortative mating in a population expressing dominance.
publisher	Public Library of Science (PLoS)
publishDate	2011
url	https://doaj.org/article/2030b581e61346c582fcb3a7468cc5ee
work_keys_str_mv	AT kristanaschneider evolutionofassortativematinginapopulationexpressingdominance AT stephanpeischl evolutionofassortativematinginapopulationexpressingdominance
_version_	1718424153856409600

Evolution of assortative mating in a population expressing dominance.

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