On the phylogeny of Mustelidae subfamilies: analysis of seventeen nuclear non-coding loci and mitochondrial complete genomes.
On the phylogeny of Mustelidae subfamilies: analysis of seventeen nuclear non-coding loci and mitochondrial complete genomes.
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DOI：
10.1186/1471-2148-11-92
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发表时间：
2011-04-10
影响因子：
3.4
通讯作者：
Zhang Y
中科院分区：
文献类型：
--
作者：
Yu L;Peng D;Liu J;Luan P;Liang L;Lee H;Lee M;Ryder OA;Zhang Y
鼬科是食肉目中最大、最具多样性的科，由8个亚科组成。这些鼬亚科之间的系统发育关系一直是有争议的话题，在最近几年。其中一个主要原因是鼬科动物是快速进化辐射和最近物种形成事件的典型例子。以往的研究主要集中在不同的线粒体（mt）序列和核蛋白编码数据的应用上，本文利用17个核非编码位点（>15 kb），结合mt全基因组数据（>16 kb），来阐明这些谜一样的问题。结合核内含子和mt基因组分析都有力地支持Taxidiinae分歧第一，其次是Melinae。在所有的分析中，Lutrinae和Mustelinae被归类在一起，并得到了有力的支持。然而，Helictidinae的位置是神秘的，因为mt基因组分析将其置于连接Lutrinae和Mustelinae的分支中，而核内含子分析则支持Helictidinae与Martinae关系更近的新观点。这一发现强调了需要增加更多的数据，包括更多的分类群来解决这个问题。此外，分子测年提供了洞察的时间尺度的起源和多样化的鼬科亚科。最后，讨论了核内含子和mt基因的系统发育的表现和限制的背景下，鼬科的系统发育。我们的研究不仅带来了新的观点，以前模糊的鼬亚科之间的系统发育关系，但也提供了另一个例子，证明核非编码基因座重建进化历史的一组，经历了快速爆发的物种。
Mustelidae, as the largest and most-diverse family of order Carnivora, comprises eight subfamilies. Phylogenetic relationships among these Mustelidae subfamilies remain argumentative subjects in recent years. One of the main reasons is that the mustelids represent a typical example of rapid evolutionary radiation and recent speciation event. Prior investigation has been concentrated on the application of different mitochondrial (mt) sequence and nuclear protein-coding data, herein we employ 17 nuclear non-coding loci (>15 kb), in conjunction with mt complete genome data (>16 kb), to clarify these enigmatic problems. The combined nuclear intron and mt genome analyses both robustly support that Taxidiinae diverged first, followed by Melinae. Lutrinae and Mustelinae are grouped together in all analyses with strong supports. The position of Helictidinae, however, is enigmatic because the mt genome analysis places it to the clade uniting Lutrinae and Mustelinae, whereas the nuclear intron analysis favores a novel view supporting a closer relationship of Helictidinae to Martinae. This finding emphasizes a need to add more data and include more taxa to resolve this problem. In addition, the molecular dating provides insights into the time scale of the origin and diversification of the Mustelidae subfamilies. Finally, the phylogenetic performances and limits of nuclear introns and mt genes are discussed in the context of Mustelidae phylogeny. Our study not only brings new perspectives on the previously obscured phylogenetic relationships among Mustelidae subfamilies, but also provides another example demonstrating the effectiveness of nuclear non-coding loci for reconstructing evolutionary histories in a group that has undergone rapid bursts of speciation.