The evolutionary network of whiptail lizards reveals predictable outcomes of hybridization

The evolutionary network of whiptail lizards reveals predictable outcomes of hybridization
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鞭尾蜥蜴的进化网络揭示了可预测的杂交结果

DOI:
10.1126/science.abn1593
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发表时间:
2022
期刊:
影响因子:
56.9
通讯作者:
Thomson, Robert C.
Thomson, Robert C.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Barley, Anthony J.;Nieto-Montes de Oca, Adrián;Manríquez-Morán, Norma L.;Thomson, Robert C.

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不同谱系之间的杂交与物种多样性的产生和丧失、渐渗、适应和繁殖模式的变化有关,但它何时和为什么会导致这些不同的结果尚不清楚。我们为最大的单性脊椎动物群体估计了一个全面的进化网络,并用它来理解杂交的进化结果。我们的结果表明,物种之间的渗入率自分歧以来随着时间的推移而下降,这表明物种必须达到进化分歧的阈值,然后杂交才会导致向单性繁殖的转变。杂交率还可以预测鞭尾蜥蜴全基因组的遗传多样性模式。这些结果区分了以前没有测试过的杂交模型,并表明进化结果是可以预测的。
Hybridization between diverging lineages is associated with the generation and loss of species diversity, introgression, adaptation, and changes in reproductive mode, but it is unknown when and why it results in these divergent outcomes. We estimate a comprehensive evolutionary network for the largest group of unisexual vertebrates and use it to understand the evolutionary outcomes of hybridization. Our results show that rates of introgression between species decrease with time since divergence and suggest that species must attain a threshold of evolutionary divergence before hybridization results in transitions to unisexuality. Rates of hybridization also predict genome-wide patterns of genetic diversity in whiptail lizards. These results distinguish among models for hybridization that have not previously been tested and suggest that the evolutionary outcomes can be predictable.
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