| 来源类型 | Monograph (IIASA Interim Report)
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| 规范类型 | 报告
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| The Evolution of Self-Fertilization in Density-Regulated Populations. |
| Cheptou P-O; Dieckmann U
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| 发表日期 | 2002
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| 出版者 | IIASA, Laxenburg, Austria: IR-02-024
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| 出版年 | 2002
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| 语种 | 英语
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| 摘要 | We study the evolution of selfing in hermaphrodites to reveal the demographic conditions that lead to intermediate selfing rates. Using a demographic model based on Ricker-type density regulation we first assume that independent of population density, inbred individuals survive less well than outbred individuals and, second, that inbred and outbred individuals differ in their competitive abilities in density-regulated populations. The evolution of selfing, driven by inbreeding depression and the cost of outcrossing, is then analyzed for three fundamentally different demographic scenarios: stable population densities, deterministically varying population densities (resulting from cyclical or chaotic population dynamics), and stochastic fluctuations of carrying capacities (resulting from environmental noise). We show that even under stable demographic conditions evolutionary outcomes are not confined to either complete selfing or full outcrossing. Instead, intermediate selfing rates arise under a wide range of conditions, depending on the nature of competitive interactions between inbred and outbred individuals. We also explore the evolution of selfing under deterministic and stochastic density fluctuations to demonstrate that such environmental conditions can evolutionarily stabilize intermediate selfing rates. This is the first study to consider in detail the effect of density regulation on the evolution of selfing rates. |
| 主题 | Adaptive Dynamics Network (ADN)
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| URL | http://pure.iiasa.ac.at/id/eprint/6761/
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| 来源智库 | International Institute for Applied Systems Analysis (Austria)
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| 资源类型 | 智库出版物
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| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/125181
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推荐引用方式
GB/T 7714 |
Cheptou P-O,Dieckmann U. The Evolution of Self-Fertilization in Density-Regulated Populations.. 2002.
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文件名：
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IR-02-024.pdf
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格式：
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Adobe PDF
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