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来源类型Article
规范类型其他
DOI10.1016/j.tpb.2010.12.001
Effects of genetic architecture on the evolution of assortative mating under frequency-dependent disruptive selection.
Rettelbach A; Hermisson J; Dieckmann U; Kopp M
发表日期2011
出处Theoretical Population Biology 79 (3): 82-96
出版年2011
语种英语
摘要We consider a model of sympatric speciation due to frequency-dependent competition, in which it was previously assumed that the evolving traits have a very simple genetic architecture. In the present study, we numerically analyze the consequences of relaxing this assumption. First, previous models assumed that assortative mating evolves in infinitesimal steps. Here, we show that the range of parameters for which speciation is possible increases when mutational steps are large. Second, it was assumed that the trait under frequency-dependent selection is determined by a single locus with two alleles and additive effects. As a consequence, the resultant intermediate phenotype is always heterozygous and can never breed true. To relax this assumption, here we add a second locus influencing the trait. We find three new possible evolutionary outcomes: evolution of three reproductively isolated species, a monomorphic equilibrium with only the intermediate phenotype, and a randomly mating population with a steep unimodal distribution of phenotypes. Both extensions of the original model thus increase the likelihood of competitive speciation.
主题Evolution and Ecology (EEP)
关键词Competitive sympatric speciation Assortative mating Frequency-dependent selection Mutational effect size Invasion fitness Costs of choosiness
URLhttp://pure.iiasa.ac.at/id/eprint/9621/
来源智库International Institute for Applied Systems Analysis (Austria)
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资源类型智库出版物
条目标识符http://119.78.100.153/handle/2XGU8XDN/129332
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Rettelbach A,Hermisson J,Dieckmann U,et al. Effects of genetic architecture on the evolution of assortative mating under frequency-dependent disruptive selection.. 2011.
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