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.

中文翻译：

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鞭尾蜥的进化网络揭示了杂交的可预测结果

不同谱系之间的杂交与物种多样性的产生和丧失、基因渗入、适应和生殖模式的变化有关，但尚不清楚何时以及为什么会导致这些不同的结果。我们为最大的单性脊椎动物群估计了一个综合进化网络，并用它来了解杂交的进化结果。我们的研究结果表明，物种之间的基因渗入率自分化以来随着时间的推移而降低，并表明物种必须在杂交导致向单性转变之前达到进化分化的阈值。杂交率还可以预测鞭尾蜥的全基因组遗传多样性模式。