Pomiankowski A, Iwasa Y
Department of Biology, University College London, NW1 2HE, United Kingdom.
Proc Natl Acad Sci U S A. 1998 Apr 28;95(9):5106-11. doi: 10.1073/pnas.95.9.5106.
Fisher's runaway process of sexual selection is potentially an important force generating character divergence between closely related populations. We investigated the evolution of multiple female preferences by Fisher's runaway process. There are two outcomes of runaway. The first is the evolution of mate preference to a stable equilibrium. This evolution occurs if the benefits of mate choice are sufficiently large relative to the cost of choice. Alternatively, mate preferences evolve cyclically. The rate and pattern of cyclic evolution depends primarily on the individual cost of choice and epistasis in the joint cost of choice. If there are small differences in natural selection (e.g., predation risk) between populations, cyclic evolution quickly leads to divergence in mate preferences and sexual ornaments and so to sexual isolation.
费希尔性选择的失控过程可能是导致近缘种群间性状分化的重要力量。我们通过费希尔失控过程研究了多种雌性偏好的进化。失控有两种结果。第一种是配偶偏好进化至稳定平衡。如果配偶选择的益处相对于选择成本足够大，这种进化就会发生。另外，配偶偏好会循环进化。循环进化的速率和模式主要取决于个体选择成本以及选择联合成本中的上位性。如果种群间自然选择（如捕食风险）存在微小差异，循环进化会迅速导致配偶偏好和性饰的分化，进而导致生殖隔离。
