The lek paradox and the capture of genetic variance by condition dependent traits
The lek paradox and the capture of genetic variance by condition dependent traits
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DOI：
10.1098/rspb.1996.0207
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发表时间：
1996-10-22
影响因子：
4.7
通讯作者：
Houle, D
中科院分区：
文献类型：
--
作者：
Rowe, L;Houle, D
最近的证据表明，性选择的特征具有出乎意料的高遗传变异。在本文中，我们提供了一个简单而通用的机制来解释这一观察结果。我们的解释为lek悖论提供了一个解决方案，它只建立在两个假设之上；性选择性状的条件依赖性和条件的高遗传变异。前一种假设得到了经验证据的充分支持。我们讨论后一种假设的证据。这两个假设不可避免地导致遗传变异被捕获为性选择性状，同时伴随着条件依赖性的进化。我们提出一个简单的遗传模型来说明这一观点。然后，我们探讨了基因捕获对雌性偏好和雄性特征共同进化的一些影响。我们对这个问题的阐述偶然地导致了对性选择特征和生活史特征之间的相似性的新见解，从而导致了后者高度遗传变异的维持。最后，我们讨论了最近提出的lek悖论的替代解决方案的一些缺点；方差选择。
Recent evidence suggests that sexually selected traits have unexpectedly high genetic variance. In this paper, we offer a simple and general mechanism to explain this observation. Our explanation offers a resolution to the lek paradox and rests on only two assumptions; condition dependence of sexually selected traits and high genetic variance in condition. The former assumption is well supported by empirical evidence. We discuss the evidence for the latter assumption. These two assumptions lead inevitably to the capture of genetic variance into sexually selected traits concomitantly with the evolution of condition dependence. We present a simple genetic model to illustrate this view. We then explore some implications of genic capture for the coevolution of female preference and male traits. Our exposition of this problem incidentally leads to new insights into the similarities between sexually selected traits and life history traits, and therefore into the maintenance of high genetic variance in the latter. Finally, we discuss some shortcomings of a recently proposed alternative solution to the lek paradox; selection on variance.