Probing evolutionary patterns in neotropical birds through DNA barcodes.
Probing evolutionary patterns in neotropical birds through DNA barcodes.
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DOI：
10.1371/journal.pone.0004379
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发表时间：
2009
期刊：
影响因子：
3.7
通讯作者：
Tubaro PL
中科院分区：
文献类型：
--
作者：
Kerr KC;Lijtmaer DA;Barreira AS;Hebert PD;Tubaro PL
新热带鸟类区系比任何其他生物地理区域都更加多样，但我们对区域分化模式的理解是有限的。目前，对这一问题的关键检查受到可用遗传信息有限的限制。这项研究通过收集阿根廷鸟类的线粒体COI序列或DNA条形码的文库，并将它们的遗传多样性模式与北美鸟类的遗传多样性模式进行比较，开始解决这一差距。对500种阿根廷物种进行了检查，这是对南美鸟类DNA条形码的首次重大检查。我们的结果表明，大多数南方新热带鸟类物种与它们最近的物种表现出严重的序列差异，证实了该动物群的高度多样性并不是建立在年轻物种辐射的增加的基础上的。尽管北美和南美洲温带鸟类区系的物种年龄似乎相似，但在新热带地区，区域分化的模式更为复杂，这表明新热带鸟类区系的高度多样性是由更大的区域差异机会推动的。在至少21个物种中观察到了深刻的遗传分裂，尽管这些谱系的分布模式是不同的。物种之间缺乏共有的多态现象，甚至在生殖隔离时间不到50万年的物种中也是如此，这进一步表明选择性扫荡可以有规律地切除祖先的线粒体多态。这些发现证实了通过DNA条形码在鸟类中进行物种划分的有效性，即使在全球范围内进行测试时也是如此。此外，他们还展示了标准化基因区域的大型文库如何提供对进化过程的洞察。
The Neotropical avifauna is more diverse than that of any other biogeographic region, but our understanding of patterns of regional divergence is limited. Critical examination of this issue is currently constrained by the limited genetic information available. This study begins to address this gap by assembling a library of mitochondrial COI sequences, or DNA barcodes, for Argentinian birds and comparing their patterns of genetic diversity to those of North American birds. Five hundred Argentinian species were examined, making this the first major examination of DNA barcodes for South American birds. Our results indicate that most southern Neotropical bird species show deep sequence divergence from their nearest-neighbour, corroborating that the high diversity of this fauna is not based on an elevated incidence of young species radiations. Although species ages appear similar in temperate North and South American avifaunas, patterns of regional divergence are more complex in the Neotropics, suggesting that the high diversity of the Neotropical avifauna has been fueled by greater opportunities for regional divergence. Deep genetic splits were observed in at least 21 species, though distribution patterns of these lineages were variable. The lack of shared polymorphisms in species, even in species with less than 0.5M years of reproductive isolation, further suggests that selective sweeps could regularly excise ancestral mitochondrial polymorphisms. These findings confirm the efficacy of species delimitation in birds via DNA barcodes, even when tested on a global scale. Further, they demonstrate how large libraries of a standardized gene region provide insight into evolutionary processes.
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DOI：
10.1111/j.1471-8286.2006.01428.x
发表时间：
2006-12-01
期刊：
MOLECULAR ECOLOGY NOTES
影响因子：
--
作者：
Ivanova, Natalia V.;Dewaard, Jeremy R.;Hebert, Paul D. N.
通讯作者：
Hebert, Paul D. N.
影响因子：
9.8
作者：
Hebert PD;Stoeckle MY;Zemlak TS;Francis CM
通讯作者：
Francis CM
影响因子：
4.1
作者：
Hackett, SJ
通讯作者：
Hackett, SJ
影响因子：
4.9
作者：
Cicero, C;Johnson, NK
通讯作者：
Johnson, NK
影响因子：
2.8
作者：
Gillings, S;Fuller, RJ;Sutherland, WJ
通讯作者：
Sutherland, WJ