| 来源类型 | Monograph (IIASA Interim Report) |
| 规范类型 | 报告 |
| 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 |
| 出版者 | IIASA, Laxenburg, Austria: IR-11-019 |
| 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 use numerical simulations to test 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 to alleles and additive effects. As a consequence, the resultant intermediate phenotype is always heterozygous and can never breed true. To relax this assumption, we now add a second locus influencing the trait. We find three new possible evolutionary outcomes: evolution of three reproductive 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 |
| URL | http://pure.iiasa.ac.at/id/eprint/9815/ |
| 来源智库 | International Institute for Applied Systems Analysis (Austria) |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/125824 |
| 推荐引用方式 GB/T 7714 | Rettelbach A,Hermisson J,Dieckmann U,et al. Effects of Genetic Architecture on the Evolution of Assortative Mating Under Frequency-dependent Disruptive Selection.. 2011. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 资源类型 | 版本类型 | 开放类型 | 使用许可 | ||
| IR-11-019.pdf（369KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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