Rates of phenotypic evolution of ecological characters and sexual traits during the Tanganyikan cichlid adaptive radiation
Rates of phenotypic evolution of ecological characters and sexual traits during the Tanganyikan cichlid adaptive radiation
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DOI：
10.1111/j.1420-9101.2011.02365.x
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发表时间：
2011-11-01
影响因子：
2.1
通讯作者：
Kolm, N.
中科院分区：
文献类型：
--
作者：
Gonzalez-Voyer, A.;Kolm, N.
理论表明，性特征比生态特征进化得更快。然而，物种生态位的特征也可能影响性特征的进化。因此，一个悬而未决的问题是，在快速的生态分化时期，如适应性辐射，生态特征和性特征是否表现出相似的进化速度和模式。在此，我们使用最近发展的系统发育比较方法来分析坦噶尼干鲷的生态和性特征的进化时间动态。结果表明，生态性状差异在辐射早期集中，而性性状差异在整个辐射过程中仍然很高。因此，近亲坦噶尼干慈鲷的性性状差异大于生态性状差异。性性状的选择也比生态性状强。总之，我们的研究结果表明，生态性状和性性状具有不同的进化模式，即使在适应性辐射中，性性状的进化速度也比生态性状快。
Theory suggests that sexual traits evolve faster than ecological characters. However, characteristics of a species niche may also influence evolution of sexual traits. Hence, a pending question is whether ecological characters and sexual traits present similar tempo and mode of evolution during periods of rapid ecological divergence, such as adaptive radiation. Here, we use recently developed phylogenetic comparative methods to analyse the temporal dynamics of evolution for ecological and sexual traits in Tanganyikan cichlids. Our results indicate that whereas disparity in ecological characters was concentrated early in the radiation, disparity in sexual traits remained high throughout the radiation. Thus, closely related Tanganyikan cichlids presented higher disparity in sexual traits than ecological characters. Sexual traits were also under stronger selection than ecological characters. In sum, our results suggest that ecological characters and sexual traits present distinct evolutionary patterns, and that sexual traits can evolve faster than ecological characters, even during adaptive radiation.