Mitochondrial phylogeny of hedgehogs and monophyly of Eulipotyphla
Mitochondrial phylogeny of hedgehogs and monophyly of Eulipotyphla
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DOI：
10.1016/s1055-7903(03)00120-9
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发表时间：
2003-08-01
影响因子：
4.1
通讯作者：
Hasegawa, M
中科院分区：
文献类型：
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作者：
Nikaido, M;Cao, Y;Hasegawa, M
我们对三种食虫动物的线粒体（mt）基因组进行了完整的测序：长耳刺猬Hemiechinus auritus，日本鼹鼠Mogera wogura和大日本地鼠Urotrichus talpoides。这些mtDNA数据与其他先前测序的mtDNA一起使用最大似然法进行分析，以推断它们在真兽目动物中的系统发育关系。以前的线粒体蛋白质分析使用了一个简单的模型，没有考虑网站的异质性，Erinaceoidea（刺猬和月鼠）被放置在基础的真兽亚目的位置，是从Soricoidea（鼩）和Talpoidea（摩尔）分开，这表明排除Erinaceoidea-Eulipotyphla树。通过包括新的线粒体DNA序列和引入网站的异质性模型，Erinaceoidea-Eulipotyphla树出现作为最好的树或作为一个树的对数似然得分与最好的树无法区分。然而，这一结论取决于Erinaceoidea中的物种采样，表明物种采样和使用适当的替代模型推断系统发育关系时的重要性。(C)2003 Elsevier Science（美国）。All rights reserved.
We sequenced the complete mitochondrial (mt) genomes of three insectivores: the long-eared hedgehog Hemiechinus auritus, the Japanese mole Mogera wogura, and the greater Japanese shrew-mole Urotrichus talpoides. These mtDNA data together with other previously sequenced mtDNAs were analyzed using a maximum likelihood method to infer their phylogenetic relationships among eutherians. Previous mitochondrial protein analyses used a simple model that did not consider site-heterogeneity, and Erinaceoidea (hedgehogs and moonrats) was placed at the basal eutherian position that is separated from Soricoidea (shrews) and Talpoidea (moles), suggesting the exclusion of the Erinaceoidea-Eulipotyphla tree. By including the new mtDNA sequences and introducing site-heterogeneity into the model, the Erinaceoidea-Eulipotyphla tree emerges as the best tree or as a tree with a log-likelihood score indistinguishable from that of the best tree. However, this conclusion depends on species sampling in Erinaceoidea, demonstrating the importance of both species sampling and use of an appropriate substitution model when inferring phylogenetic relationships. (C) 2003 Elsevier Science (USA). All rights reserved.