Molecular phylogenetics of soricid shrews (Mammalia) based on mitochondrial cytochrome b gene sequences:: with special reference to the Soricinae
Molecular phylogenetics of soricid shrews (Mammalia) based on mitochondrial cytochrome b gene sequences:: with special reference to the Soricinae
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DOI：
10.1111/j.1469-7998.2006.00125.x
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发表时间：
2006-09-01
影响因子：
2
通讯作者：
Abe, H.
中科院分区：
文献类型：
--
作者：
Ohdachi, S. D.;Hasegawa, M.;Abe, H.
基于1140 bp线粒体细胞色素b基因（cytb）序列，采用最大似然（ML）方法推测了soricid鼩鼱（Soricidae, Eulipotyphla, mamia）的分子系统发育。现有的13个Soricinae属和2个Crocidurinae属均被纳入分析。Anourosorex在系统发育上与ML树中Soricinae和Crocidurinae的主要类群距离较远。因此，不能确定Anourosorex应该归属于哪个亚科：Soricinae， Crocidurinae还是一个新的亚科。Soricinae（不包括Anourosorex）应分为四个部落：Neomyini， Notiosoricini， Soricini和Blarinini。然而，在目前的数据集中，blarinii的单性并不健壮。此外，由于cytb序列的系统发育信息不足，无法确定Soricinae各部落间和Neomyini属间的分支顺序。对于Neomyini的水鼩（chimale， Nectogale和Neomys）， Neomys和Chimarrogale-Nectogale类群的单系性无法得到验证，这意味着Neomyini内部类群中半水生生活方式可能存在多个起源。会阴属可包含几个独立的属。根据cytb序列，Blarinella属于Blarinini而不是Soricini，但置信度较低；因此，需要更多的系统发育信息来确定其系统发育位置。此外，还澄清了一些关于鼩鼱分类学的具体问题，如中国爬行鼩、喜马拉雅奇马鼩和黄斑鼩的地方种群系统发育问题。
Molecular phylogeny of soricid shrews (Soricidae, Eulipotyphla, Mammalia) based on 1140 bp mitochondrial cytochrome b gene (cytb) sequences was inferred by the maximum likelihood (ML) method. All 13 genera of extant Soricinae and two genera of Crocidurinae were included in the analyses. Anourosorex was phylogenetically distant from the main groupings within Soricinae and Crocidurinae in the ML tree. Thus, it could not be determined to which subfamily Anourosorex should be assigned: Soricinae, Crocidurinae or a new subfamily. Soricinae (excluding Anourosorex) should be divided into four tribes: Neomyini, Notiosoricini, Soricini and Blarinini. However, monophyly of Blarinini was not robust in the present data set. Also, branching orders among tribes of Soricinae and those among genera of Neomyini could not be determined because of insufficient phylogenetic information of the cytb sequences. For water shrews of Neomyini (Chimarrogale, Nectogale and Neomys), monophyly of Neomys and the Chimarrogale-Nectogale group could not be verified, which implies the possibility of multiple origins for the semi-aquatic mode of living among taxa within Neomyini. Episoriculus may contain several separate genera. Blarinella was included in Blarinini not Soricini, based on the cytb sequences, but the confidence level was rather low; hence more phylogenetic information is needed to determine its phylogenetic position. Furthermore, some specific problems of taxonomy of soricid shrews were clarified, for example phylogeny of local populations of Notiosorex crawfordi, Chimarrogale himalayica and Crocidura attenuata.