Gleason Jennifer M, Ritchie Michael G
Environmental and Evolutionary Biology, Bute Medical Building, University of St. Andrews, St. Andrews, Fife, KY16 9TS, Scotland.
Evolution. 1998 Oct;52(5):1493-1500. doi: 10.1111/j.1558-5646.1998.tb02031.x.
Reproductive isolation increases with genetic distance between species. Although sexual selection may drive divergence of sexual signals and traits, causing rapid evolution of sexual isolation, quantitative data supporting this idea are rare. We examine the rates of divergence of a species-specific courtship signal, sexual isolation, and postmating isolation in the Drosophila willistoni group. Both types of isolation increase with genetic distance and postmating isolation is the most strongly correlated with genetic divergence, suggesting this has the least variable divergence rate. Song divergence is not correlated with genetic divergence. Homoplasy in song pattern results in poorly resolved phylogenies that are different from molecular phylogenies. Song evolves more quickly than sexual isolation, which evolves more quickly than postmating isolation.
生殖隔离随着物种间遗传距离的增加而增强。虽然性选择可能会推动性信号和性状的分化，导致性隔离的快速进化，但支持这一观点的定量数据却很少。我们研究了威氏果蝇组中一种物种特异性求偶信号的分化速率、性隔离和交配后隔离。两种隔离类型均随遗传距离增加，且交配后隔离与遗传分化的相关性最强，这表明其分化速率的变异性最小。鸣声分化与遗传分化不相关。鸣声模式中的同塑性导致系统发育关系难以解析，与分子系统发育不同。鸣声的进化比性隔离更快，而性隔离的进化又比交配后隔离更快。
