Mesozoic retroposons reveal parrots as the closest living relatives of passerine birds.
Mesozoic retroposons reveal parrots as the closest living relatives of passerine birds.
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DOI：
10.1038/ncomms1448
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发表时间：
2011-08-23
影响因子：
16.6
通讯作者：
中科院分区：
文献类型：
--
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雀形目鸟类（如研究充分的斑胸草雀）与非雀形目鸟类的关系是鸟类系统发育研究的一大谜团，因为数十年的广泛形态学和分子研究在数据集之间和数据集内产生了高度不一致的结果。在这里，我们展示了第一个应用程序的几乎无同源性的反转录插入到这个争议。我们的研究检查了来自各种鸟类基因组的约200，000个含有逆转录酶的位点，并检索了51个解决早期鸟类遗传的标记。其中，我们获得了统计上显着的证据，鹦鹉是最接近和猎鹰的第二个最近的亲属雀形目，共同构成鹦鹉科和Eufalconimorphae，分别。我们的新的和强大的系统发育框架的解释从雀形目作为模式生物的各种结论有重大影响。这包括与人类神经科学相关的见解，因为声音学习（即鸟鸣）可能是在鹦鹉的祖先中进化的，比以前假设的早3000万年。斑胸草雀是雀形目鸟类，但它们与非雀形目鸟类的系统发育关系仍然存在争议。通过检查鸟类基因组中的逆转录酶插入位点，作者揭示了鹦鹉是雀形目鸟类的最近亲属，这可能对理解鸟鸣的进化有意义。
The relationships of passerines (such as the well-studied zebra finch) with non-passerine birds is one of the great enigmas of avian phylogenetic research, because decades of extensive morphological and molecular studies yielded highly inconsistent results between and within data sets. Here we show the first application of the virtually homoplasy-free retroposon insertions to this controversy. Our study examined ~200,000 retroposon-containing loci from various avian genomes and retrieved 51 markers resolving early bird phylogeny. Among these, we obtained statistically significant evidence that parrots are the closest and falcons the second-closest relatives of passerines, together constituting the Psittacopasserae and the Eufalconimorphae, respectively. Our new and robust phylogenetic framework has substantial implications for the interpretation of various conclusions drawn from passerines as model organisms. This includes insights of relevance to human neuroscience, as vocal learning (that is, birdsong) probably evolved in the psittacopasseran ancestor, >30 million years earlier than previously assumed. Zebra finches are passerine birds, but their phylogenetic relationship with non-passerine birds remains controversial. By examining retroposon insertion loci in avian genomes, the authors reveal that parrots are the closest relatives of passerines, which may have implications for understanding the evolution of birdsong.
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作者：
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作者：
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通讯作者：
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DOI：
10.1111/j.1439-0469.2009.00552.x
发表时间：
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影响因子：
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作者：
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通讯作者：
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