Kin competition, the cost of inbreeding and the evolution of dispersal
Kin competition, the cost of inbreeding and the evolution of dispersal
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DOI：
10.1006/jtbi.1999.0994
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发表时间：
1999-10-21
影响因子：
2
通讯作者：
Gandon, S
中科院分区：
文献类型：
--
作者：
Gandon, S
扩散通常被认为是一种避免亲属间竞争和近交衰退的机制。然而，这两个因素对扩散演化的影响的正式分析只在少数具有强限制性假设的研究中进行。在本文中，我首先推导出进化稳定扩散率作为三个参数的函数：（1）扩散成本，c，（2）随机选择的后代之间的相关系数，R，和（3）近亲繁殖的成本，δ。在第二步中，相关性被用来作为一个动态变量的演化稳定的扩散率的推导。最后，在第三步中，相关性和近亲繁殖的成本被假定为动态变量。这使得分析更现实的情况下，传播，相关性和成本的近亲繁殖是共同进化的同时。根据遗传决定论（单倍体或二倍体），传播策略的控制（父母或后代控制的传播）和可塑性的传播与性别（有或没有性别特异性的传播率），考虑几个子例。这种分析澄清了成本的近亲繁殖和亲属竞争的扩散的演变（特别是性别偏见的扩散率的演变）的作用，并导致定量和可检验的预测。(C)北京：科学出版社.
Dispersal is often presented as a mechanism to avoid competition among relatives and inbreeding depression. However, the formal analysis of the effects of both these factors on the evolution of dispersal has only been conducted in few studies with strong restrictive assumptions. In this paper, I first derive the evolutionary stable dispersal rate as a function of three parameters: (1) the cost of dispersal, c, (2) the coefficient of relatedness among randomly chosen offspring, R, and (3) the cost of inbreeding, delta. In a second step, relatedness is used as a dynamical variable for the derivation of the evolutionarily stable dispersal rate. Finally, in a third step, relatedness and the cost of inbreeding are assumed to be dynamical variables. This allows to analyse the more realistic situation where dispersal, relatedness and the cost of inbreeding are coevolving simultaneously. Several subcases are considered depending on the genetic determinism (haploid or diploid), the control of the dispersal strategy (parent or offspring control of dispersal) and the plasticity of dispersal with sexes (with or without sex-specific dispersal rates). This analysis clarifies the role of the cost of inbreeding and kin competition on the evolution of dispersal (in particular on the evolution of sex-biased dispersal rates) and leads to quantitative and testable predictions. (C) 1999 Academic Press.