Speciation in birds: Genes, geography, and sexual selection
Speciation in birds: Genes, geography, and sexual selection
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DOI：
10.1073/pnas.0501846102
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发表时间：
2005-05-03
影响因子：
11.1
通讯作者：
Sorenson, MD
中科院分区：
文献类型：
--
作者：
Edwards, SV;Kingan, SB;Sorenson, MD
在过去的30年里，鸟类物种形成的分子研究主要集中在地理学、生态学和物种形成的时间上，这一传统可以追溯到迈尔的系统学和物种起源。然而，近年来，对鸟类物种形成的行为和分子机制的兴趣有所增加，部分建立在更古老的传统和对驯化物种的观察上。结果是，许多为果蝇等模式谱系提供的机制，如遗传不相容性，强化和性选择，现在正在认真对待鸟类，尽管分辨率要低得多。最近完成的鸡基因组序列草图，以及常染色体和性染色体上丰富的单核苷酸多态性，将大大加快在未来几年内对鸟类物种形成的分子机制的研究。鸟类学家现在面临的挑战是，通过提高分子分辨率，为自然界物种形成的研究提供信息，克隆物种形成基因，如果它们存在的话，从而评估鸟类多样化的外在、内在、确定性和随机原因的相对作用。
Molecular studies of speciation in birds over the last three decades have been dominated by a focus on the geography, ecology, and timing of speciation, a tradition traceable to Mayr's Systematics and the Origin of Species. However, in the recent years, interest in the behavioral and molecular mechanisms of speciation in birds has increased, building in part on the older traditions and observations from domesticated species. The result is that many of the same mechanisms proffered for model lineages such as Drosophila-mechanisms such as genetic incompatibilities, reinforcement, and sexual selection-are now being seriously entertained for birds, albeit with much lower resolution. The recent completion of a draft sequence of the chicken genome, and an abundance of single-nucleotide polymorphisms on the autosomes and sex chromosomes, will dramatically accelerate research on the molecular mechanisms of avian speciation over the next few years. The challenge for ornithologists is now to inform well studied examples of speciation in nature with increased molecular resolution-to clone speciation genes if they exist-and thereby evaluate the relative roles of extrinsic, intrinsic, deterministic, and stochastic causes for avian diversification.