Evolutionary diversification of opercle shape in Cook Inlet threespine stickleback
Evolutionary diversification of opercle shape in Cook Inlet threespine stickleback
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DOI：
10.1111/j.1095-8312.2009.01258.x
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发表时间：
2009-08-01
影响因子：
1.9
通讯作者：
Bell, Michael A.
中科院分区：
文献类型：
--
作者：
Arif, Saad;Aguirre, Windsor E.;Bell, Michael A.
我们调查了一个大的面骨，鳃盖骨（OP），在湖泊种群的threespine棘鱼，溯河产卵的祖先，库克湾，阿拉斯加。最近的研究表明，海洋和湖泊种群之间的OP变异，并绘制了一个数量性状基因座的OP形状有很大的影响。使用不同的环境和独立的进化历史的人口，我们研究了分歧的OP形状溯河产卵的祖先。我们报告的初步证据之间的分歧底栖和通才湖泊生态型，需要进一步调查。此外，OP形状的快速分歧发生在一个湖泊人口，成立于20世纪80年代的溯河产卵棘鱼，这是一致的其他表型性状的分歧和OP多样化在其他湖泊人口。相比之下，有有限的OP形状的第二个湖人口，可能经历了遗传瓶颈，在其历史的早期，缺乏遗传变异的OP分歧的演变。两者合计，从这两个群体中获得的结果是一致的其他棘鱼表型性状的研究，牵连在冰后期适应性辐射的threespine棘鱼在淡水中的祖先的变化。(C)2009 The Linnean Society of伦敦，Biological Journal of the Linnean Society，2009，97，832-844。
We investigated the evolution of a large facial bone, the opercle (OP), in lake populations of the threespine stickleback that were founded by anadromous ancestors, in Cook Inlet, Alaska. Recent studies characterized OP variation among marine and lake populations and mapped a quantitative trait locus with a large influence on OP shape. Using populations from diverse environments and independent evolutionary histories, we examined divergence of OP shape from that of the anadromous ancestor. We report preliminary evidence for divergence between benthic and generalist lake ecotypes, necessitating further investigation. Furthermore, rapid divergence of OP shape has occurred in a lake population that was founded by anadromous stickleback in the 1980s, which is consistent with divergence of other phenotypic traits and with OP diversification in other lake populations. By contrast, there has been limited evolution of OP shape in a second lake population that may have experienced a genetic bottleneck early in its history and lacks genetic variation for OP divergence. Taken together, the results obtained from these two populations are consistent with studies of other stickleback phenotypic traits that implicate ancestral variation in postglacial adaptive radiation of threespine stickleback in fresh water. (C) 2009 The Linnean Society of London, Biological Journal of the Linnean Society, 2009, 97, 832-844.