On a genetic model of intraspecific competition and stabilizing selection

The American Naturalist
Reinhard Bürger

Abstract

A genetic model is investigated in which two recombining loci determine the genotypic value of a quantitative trait additively. Two opposing evolutionary forces are assumed to act: stabilizing selection on the trait, which favors genotypes with an intermediate phenotype, and intraspecific competition mediated by that trait, which favors genotypes whose effect on the trait deviates most from that of the prevailing genotypes. Accordingly, fitnesses of genotypes have a frequency-independent component describing stabilizing selection and a frequency- and density-dependent component modeling competition. We study how the underlying genetics, in particular recombination rate and relative magnitude of allelic effects, interact with the conflicting selective forces and derive the resulting, surprisingly complex equilibrium patterns. We also investigate the conditions under which disruptive selection on the phenotypes can be observed and examine how much genetic variation can be maintained in such a model. We discovered a number of unexpected phenomena. For instance, we found that with little recombination the degree of stably maintained polymorphism and the equilibrium genetic variance can decrease as the strength of competition increa...Continue Reading

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Citations

Jun 1, 2007·Proceedings of the National Academy of Sciences of the United States of America·Daniel I BolnickLennart Persson
May 4, 2006·The American Naturalist·Reinhard Bürger, Kristan A Schneider
Jun 16, 2012·Theoretical Population Biology·Tadeas Priklopil
Mar 17, 2009·Journal of Theoretical Biology·Elizabeth M BaptestiniMárcio S Araújo
Mar 17, 2009·Theoretical Population Biology·Carlo Matessi, Kristan A Schneider
Jan 29, 2008·Theoretical Population Biology·Tuomas Nurmi, Kalle Parvinen
Jan 8, 2008·Journal of Theoretical Biology·Stephan Peischl, Reinhard Bürger
Feb 6, 2007·Theoretical Population Biology·Kristan A Schneider
Jul 30, 2005·Evolution; International Journal of Organic Evolution·Xu-Sheng Zhang, William G Hill
Aug 27, 2010·Journal of Fish Biology·O Puebla
Apr 1, 2008·Evolution; International Journal of Organic Evolution·Peter A AbramsGary Kim
Aug 26, 2006·Evolution; International Journal of Organic Evolution·Michael Kopp, Sergey Gavrilets
Apr 8, 2006·Journal of Evolutionary Biology·K A Schneider, R Bürger
Oct 5, 2006·Evolution; International Journal of Organic Evolution·Michael Kopp, Joachim Hermisson
Sep 29, 2009·Evolution; International Journal of Organic Evolution·Stephan Peischl, Kristan A Schneider
Mar 5, 2010·Evolution; International Journal of Organic Evolution·Christophe PélabonDavid Houle
Feb 18, 2006·Journal of Theoretical Biology·Daniel I Bolnick
Apr 15, 2014·Theoretical Population Biology·Ludwig Geroldinger, Reinhard Bürger
Dec 22, 2011·Journal of Theoretical Biology·Marco Del Giudice
Jul 28, 2006·Ecology·Mathew A Leibold, Mark A McPeek
Jan 24, 2007·Evolution; International Journal of Organic Evolution·G Sander van Doorn, Ulf Dieckmann
Sep 2, 2005·Journal of Evolutionary Biology·D Waxman, S Gavrilets
Oct 10, 2013·Evolution; International Journal of Organic Evolution·Benjamin C Haller, Andrew P Hendry
Jul 29, 2004·Genetics·Reinhard Bürger, Alexander Gimelfarb
Jun 21, 2012·Genetics·Pavlos PavlidisWolfgang Stephan
Jun 22, 2005·Theoretical Population Biology·Kristan A Schneider
Feb 7, 2004·Science·Martin A Nowak, Karl Sigmund

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