Genetic isolation by distance underlies colour pattern divergence in red-eyed treefrogs (Agalychnis callidryas).
Genetic isolation by distance underlies colour pattern divergence in red-eyed treefrogs (Agalychnis callidryas).
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DOI：
10.1111/mec.16350
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发表时间：
2022-03
影响因子：
4.9
通讯作者：
Robertson JM
中科院分区：
文献类型：
--
作者：
Clark MI;Bradburd GS;Akopyan M;Vega A;Rosenblum EB;Robertson JM
研究遗传和表型变异的空间分布可以深入了解自然系统中形成多样性的进化过程。我们对哥斯达黎加红眼树蛙（Agalychnis callidryas）的遗传和表型多样性模式进行了表征，以了解其颜色模式多样化的驱动因素。在太平洋沿岸，红眼树蛙的腿有明显的颜色图案，从北部的橙色到南部的紫色。我们测量了青蛙的表型变异，在橙色到紫色过渡发生的地方增加了采样。在过渡区，我们发现了多种颜色模式变体的共存。为了探索这种变异的可能原因，我们生成了一个单核苷酸多态性数据集来分析群体遗传结构，测量遗传多样性并推断介导基因型-表型动力学的过程。我们研究了遗传亲缘关系的模式如何与沿海地区的颜色模式的个体测量相对应，包括在橙色和紫色表型组共同出现的地理区域中对杂交作用的测试。我们没有发现证据表明过渡带的颜色模式多态性是通过最近的杂交产生的。相反，由距离产生的强烈的遗传隔离模式表明，颜色模式的变异要么是通过其他过程保留下来的，比如祖先的颜色多态性或古代的二次接触，要么是由新的突变产生的。我们发现，太平洋沿岸的表型变化比仅基于遗传差异和地理距离的预期要大。综上所述，我们的研究结果表明，在小的地理范围内，选择压力可能对颜色模式起作用。
Investigating the spatial distribution of genetic and phenotypic variation can provide insights into the evolutionary processes that shape diversity in natural systems. We characterized patterns of genetic and phenotypic diversity to learn about drivers of colour-pattern diversification in red-eyed treefrogs (Agalychnis callidryas) in Costa Rica. Along the Pacific coast, red-eyed treefrogs have conspicuous leg colour patterning that transitions from orange in the north to purple in the south. We measured phenotypic variation of frogs, with increased sampling at sites where the orange-to-purple transition occurs. At the transition zone, we discovered the co-occurrence of multiple colour-pattern morphs. To explore possible causes of this variation, we generated a single nucleotide polymorphism data set to analyse population genetic structure, measure genetic diversity and infer the processes that mediate genotype–phenotype dynamics. We investigated how patterns of genetic relatedness correspond to individual measures of colour pattern along the coast, including testing for the role of hybridization in geographic regions where orange and purple phenotypic groups co-occur. We found no evidence that colour-pattern polymorphism in the transition zone arose through recent hybridization. Instead, a strong pattern of genetic isolation by distance indicates that colour-pattern variation was either retained through other processes such as ancestral colour polymorphisms or ancient secondary contact, or else it was generated by novel mutations. We found that phenotype changes along the Pacific coast more than would be expected based on genetic divergence and geographic distance alone. Combined, our results suggest the possibility of selective pressures acting on colour pattern at a small geographic scale.
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影响因子：
4.1
作者：
Gompert Z;Buerkle CA
通讯作者：
Buerkle CA
影响因子：
56.9
作者：
ENDLER, JA
通讯作者：
ENDLER, JA
影响因子：
1.7
作者：
Akopyan, Maria;Kaiser, Kristine;Robertson, Jeanne M.
通讯作者：
Robertson, Jeanne M.
影响因子：
3.3
作者：
Ali, Omar A.;O'Rourke, Sean M.;Miller, Michael R.
通讯作者：
Miller, Michael R.
DOI：
10.1073/pnas.0909480107
发表时间：
2010-03-02
影响因子：
11.1
作者：
Corl, Ammon;Davis, Alison R.;Sinervo, Barry
通讯作者：
Sinervo, Barry