MICROEVOLUTIONARY PROCESSES GENERATE PHYLOGENOMIC DISCORDANCE AT ANCIENT DIVERGENCES
MICROEVOLUTIONARY PROCESSES GENERATE PHYLOGENOMIC DISCORDANCE AT ANCIENT DIVERGENCES
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DOI：
10.1111/evo.12047
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发表时间：
2013-06-01
期刊：
影响因子：
3.3
通讯作者：
Oliver, Jeffrey C.
中科院分区：
文献类型：
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作者：
Oliver, Jeffrey C.
随机种群过程可能会导致物种历史和基因历史之间的差异。假设这些过程只影响生命树中最近的分歧；然而，微观进化过程影响深层分歧的潜力可能被低估。我使用多物种合并模型来确定随机过程对深层系统发育历史的影响。在这里，我展示了许多真核类群在深度分歧时预计基因历史和物种历史之间的系统发育不一致，并且不一致的可能性随着种群规模、世代时间和树中物种的数量而增加。五个真核进化枝（被子植物、鸟类、哈帕林甲虫、哺乳动物和若虫蝴蝶）在超过 5000 万年前的分歧中表现出显着的不一致潜力，并且这种不一致潜力与分歧年龄无关。这些发现表明，在非常短的时间内发生的种群过程将对基因组历史产生持久影响，即使对于数千万至数亿年前发生的分化事件也是如此。
Stochastic population processes may cause differences between species histories and gene histories. These processes are assumed to only influence the most recent divergences in the tree of life; however, there may be underappreciated potential for microevolutionary processes to impact deep divergences. I used multispecies coalescent models to determine the impact of stochastic processes on deep phylogenomic histories. Here I show phylogenomic discordance between gene histories and species histories is expected at deep divergences for many eukaryotic taxa, and the probability of discordance increases with population size, generation time, and the number of species in the tree. Five eukaryotic clades (angiosperms, birds, harpaline beetles, mammals, and nymphalid butterflies) demonstrate significant discordance potential at divergences over 50 million years old, and this discordance potential is independent of the age of divergence. These findings demonstrate population processes acting over very short timescales will leave a lasting impact on genomic histories, even for divergence events occurring tens to hundreds of millions of years ago.