Phylogenetic relationships within mammalian order Carnivora indicated by sequences of two nuclear DNA genes.
Phylogenetic relationships within mammalian order Carnivora indicated by sequences of two nuclear DNA genes.
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DOI：
10.1016/j.ympev.2004.08.001
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发表时间：
2004-12
影响因子：
4.1
通讯作者：
Li Yu;Qing-wei Li;Oliver A. Ryder;Ya-ping Zhang;Ya-ping Zhang
中科院分区：
文献类型：
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作者：
Li Yu;Qing-wei Li;Oliver A. Ryder;Ya-ping Zhang;Ya-ping Zhang
利用IRBP基因外显子1(≈1.3kb)和第一内含子(≈1kb)的核序列数据，研究了食肉目37种现存物种的系统发育关系。这些数据被用来分析食肉动物在科和属水平上的系统发育，以及最近派生的猫科动物的种间关系。基于IRBP+TTR数据集的系统发育结果在杯形纲超级家族中得到了有力的支持，小熊猫作为与原鲤科-芥科(即野貂总科)最接近的血统，紧随其后的是鳍足类(奥塔里亚科和灰蜂科)、熊猫科(包括大熊猫)和犬科。四个猫科动物，即单系鼠疫科、海兔科和猫科以及副疫科一直令人信服地被恢复。这两个基因片段在系统发育分析中的作用得到了广泛的探索，并发现这两个基因片段都对食肉目中较高的类群联结提供了相当多的信息，但对于物种水平上的低水平分歧的联结却没有。因此，有必要寻找更多具有更快突变率的遗传标记，这些标记将在破译食肉动物中相对较新的关系方面具有诊断意义。
Phylogenetic relationships among 37 living species of order Carnivora spanning a relatively broad range of divergence times and taxonomic levels were examined using nuclear sequence data from exon 1 of the IRBP gene (≈1.3 kb) and first intron of the TTR gene (≈1 kb). These data were used to analyze carnivoran phylogeny at the family and generic level as well as the interspecific relationships within recently derived Felidae. Phylogenetic results using a combined IRBP+TTR dataset strongly supported within the superfamily Califormia, the red panda as the closest lineage to procyonid-mustelid (i.e., Musteloidea) clade followed by pinnipeds (Otariidae and Phocidae), Ursidae (including the giant panda), and Canidae. Four feliform families, namely the monophyletic Herpestidae, Hyaenidae, and Felidae, as well as the paraphyletic Viverridae were consistently recovered convincingly. The utilities of these two gene segments for the phylogenetic analyses were extensively explored and both were found to be fairly informative for higher-group associations within the order Carnivora, but not for those of low level divergence at the species level. Therefore, there is a need to find additional genetic markers with more rapid mutation rates that would be diagnostic at deciphering relatively recent relationships within the Carnivora.