Doubts about complex speciation between humans and chimpanzees.
Doubts about complex speciation between humans and chimpanzees.
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DOI：
10.1016/j.tree.2009.04.007
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发表时间：
2009-10
影响因子：
16.8
通讯作者：
Yi SV
中科院分区：
文献类型：
--
作者：
Presgraves DC;Yi SV
来自大规模 DNA 序列数据的两种模式已被提出，作为人类和黑猩猩之间的物种形成是复杂的证据，涉及杂交和强选择：人类和黑猩猩之间的分歧在常染色体上有很大差异；人类和黑猩猩之间的 X 染色体差异明显较低，但大猩猩则不然。在这里，我们描述了简单的物种形成和中性分子进化如何解释这两种模式。特别是，常染色体分歧的大范围与祖先群体中合并时间的随机变化是一致的。人类与黑猩猩在 X 染色体上的较低差异与交配系统差异引起的雄性偏向突变强度的物种差异一致。我们还强调了两种进一步的分歧模式，这对于复杂的物种形成模型来说是有问题的。因此，我们的结论对人类和黑猩猩之间复杂的物种形成提出了质疑。
Two patterns from large-scale DNA sequence data have been put forward as evidence that speciation between humans and chimpanzees was complex, involving hybridization and strong selection: divergence between humans and chimpanzees varies considerably across the autosomes; and divergence between humans and chimpanzees, but not gorilla, is markedly lower on the X chromosome. Here, we describe how simple speciation and neutral molecular evolution explain both patterns. In particular, the wide range in autosomal divergence is consistent with stochastic variation in coalescence times in the ancestral population; and the lower human--chimpanzee divergence on the X chromosome is consistent with species differences in the strength of male-biased mutation caused by differences in mating system. We also highlight two further patterns of divergence that are problematic for the complex speciation model. Our conclusions thus raise doubts about complex speciation between humans and chimpanzees.
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