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来源类型 | Article |
规范类型 | 其他 |
DOI | 10.1007/s00285-010-0380-6 |
Oligomorphic dynamics for analyzing the quantitative genetics of adaptive speciation. | |
Sasaki A; Dieckmann U | |
发表日期 | 2011 |
出处 | Journal of Mathematical Biology 63 (4): 601-635 |
出版年 | 2011 |
语种 | 英语 |
摘要 | Ecological interaction, including competition for resources, often causes frequency-dependent disruptive selection, which, when accompanied by reproductive isolation, may act as driving forces of adaptive speciation. While adaptive dynamics models have added new perspectives to our understanding of the ecological dimensions of speciation processes, it remains an open question how best to incorporate and analyze genetic detail in such models. Conventional approaches, based on quantitative genetics theory, typically assume a unimodal character distribution and examine how its moments change over time. Such approximations inevitably fail when a character distribution becomes multimodal. Here, we propose a new approximation, oligomorphic dynamics, to the quantitative genetics of populations that include several morphs and that therefore exhibit multiple peaks in their character distribution. To this end, we first decompose the character distribution into a sum of unimodal distributions corresponding to individual morphs. Characterizing these morphs by their frequency (fraction of individuals belonging to each morph), position (mean character of each morph), and width (standard deviation of each morph), we then derive the coupled eco-evolutionary dynamics of morphs through a double Taylor expansion. We show that the demographic, convergence, and evolutionary stability of a population's character distribution correspond, respectively, to the asymptotic stability of frequencies, positions, and widths under the oligomorphic dynamics introduced here. As first applications of oligomorphic dynamics theory, we analytically derive the effects (a) of the strength of disruptive selection on waiting times until speciation, (b) of mutation on conditions for speciation, and (c) of the fourth moments of competition kernels on patterns of speciation. |
主题 | Evolution and Ecology (EEP) |
关键词 | Adaptive dynamics Quantitative genetics theory Moment dynamics Adaptive speciation Evolutionarily stable strategy Convergence stability |
URL | http://pure.iiasa.ac.at/id/eprint/9573/ |
来源智库 | International Institute for Applied Systems Analysis (Austria) |
引用统计 | |
资源类型 | 智库出版物 |
条目标识符 | http://119.78.100.153/handle/2XGU8XDN/129286 |
推荐引用方式 GB/T 7714 | Sasaki A,Dieckmann U. Oligomorphic dynamics for analyzing the quantitative genetics of adaptive speciation.. 2011. |
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