Bell Michael A, Travis Matthew P
Department of Ecology and Evolution, Stony Brook University, Stony Brook, NY 11794-5245, USA.
Trends Ecol Evol. 2005 Jul;20(7):358-61. doi: 10.1016/j.tree.2005.04.021.
Analysis of adaptive radiation has had a central role in the development of evolutionary theory, but it is not clear why some groups radiate and others do not. Two recent papers by Albertson and colleagues on the genetic architecture of East African cichlid fishes implicate hybridization, transgressive segregation and genetic covariation in the early stages of adaptive radiation. Transgressive segregation and genetic covariation might be key innovations in genetic architecture that favor adaptive radiation.
对适应性辐射的分析在进化理论的发展中一直起着核心作用，但尚不清楚为何有些类群会发生辐射而有些则不会。阿尔伯森及其同事最近发表的两篇关于东非丽鱼科鱼类遗传结构的论文表明，杂交、越亲分离和遗传协变在适应性辐射的早期阶段发挥了作用。越亲分离和遗传协变可能是有利于适应性辐射的遗传结构中的关键创新。
