CONVERGENT EVOLUTION OF SEXUAL DIMORPHISM IN SKULL SHAPE USING DISTINCT DEVELOPMENTAL STRATEGIES

CONVERGENT EVOLUTION OF SEXUAL DIMORPHISM IN SKULL SHAPE USING DISTINCT DEVELOPMENTAL STRATEGIES
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使用不同的发育策略进行头骨形状中性二态性的趋同进化

DOI:
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发表时间:
2013
期刊:
Evolution; international journal of organic evolution
影响因子:
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通讯作者:
A. Abzhanov
A. Abzhanov
中科院分区:
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文献类型:
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作者:
Thomas J. Sanger;E. Sherratt;J. McGlothlin;E. Brodie;J. Losos;A. Abzhanov

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生物学家对整合形态变异的进化和发育分析的研究越来越感兴趣,因为它们有望为形态多样化的机制提供新的线索。不同类群的性二态性特征往往存在令人难以置信的差异。这种多样化必须通过发育过程中性别差异的进化改变而产生。然而,很少有关于二态性的研究试图综合进化和发展的观点。通过对 50 个安乐蜥属物种的头部形状进行几何形态测量分析,我们发现两个分支通过相似的、雄性特有的面部形态变化而趋于极端水平的两性二态性。在这两个进化支中,雄性进化出了高度拉长的面部,而雌性则保留了较为中等比例的面部。这种趋同是通过不同的发展机制来实现的;一个分支通过夸大广泛共享的、可能是祖先的发展策略而进化出极端的二态性,而另一个分支则进化出一种在该属其他地方未观察到的新颖的发展策略。总之,我们的分析表明,共同的和派生的发育特征都有助于安乐蜥蜴形态多样性的宏观进化模式。
Studies integrating evolutionary and developmental analyses of morphological variation are of growing interest to biologists as they promise to shed fresh light on the mechanisms of morphological diversification. Sexually dimorphic traits tend to be incredibly divergent across taxa. Such diversification must arise through evolutionary modifications to sex differences during development. Nevertheless, few studies of dimorphism have attempted to synthesize evolutionary and developmental perspectives. Using geometric morphometric analysis of head shape for 50 Anolis species, we show that two clades have converged on extreme levels of sexual dimorphism through similar, male‐specific changes in facial morphology. In both clades, males have evolved highly elongate faces whereas females retain faces of more moderate proportion. This convergence is accomplished using distinct developmental mechanisms; one clade evolved extreme dimorphism through the exaggeration of a widely shared, potentially ancestral, developmental strategy whereas the other clade evolved a novel developmental strategy not observed elsewhere in the genus. Together, our analyses indicate that both shared and derived features of development contribute to macroevolutionary patterns of morphological diversity among Anolis lizards.
蜥蜴 Anolis carolinensis 卵中的卵黄睾酮随性别的不同而变化。
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影响因子: --
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影响因子: --
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影响因子: --
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Sanger,ThomasJ;Norgard,ElizabethA;Pletscher,LSusan;Bevilacqua,Michael;Brooks,VictoriaR;Sandell,LindaJ;Cheverud,JamesM
通讯作者: Cheverud,JamesM