期刊
THEORETICAL POPULATION BIOLOGY
卷 79, 期 3, 页码 82-96出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.tpb.2010.12.001
关键词
Competitive sympatric speciation; Assortative mating; Frequency-dependent selection; Mutational effect size; Invasion fitness; Costs of choosiness
资金
- Vienna Science and Technology Fund (WWTF)
- University of Munich
- European Commission
- European Community
- European Science Foundation
- Austrian Science Fund
- Austrian Ministry of Science and Research
- Vienna Science and Technology Fund
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. (C) 2010 Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据