Phylogenetic relationships in genus Niviventer (Rodentia: Muridae) in China inferred from complete mitochondrial cytochrome b gene
Phylogenetic relationships in genus Niviventer (Rodentia: Muridae) in China inferred from complete mitochondrial cytochrome b gene
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DOI：
10.1016/j.ympev.2007.04.003
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发表时间：
2007-08-01
影响因子：
4.1
通讯作者：
Zheng, Xiaoguang
中科院分区：
文献类型：
--
作者：
Jing, Meidong;Yu, Hon-Tsen;Zheng, Xiaoguang
主要分布在青藏高原东南部和台湾的中国种是一个多样性的类群，尚未得到全面的分子系统发育分析。在这里，我们根据线粒体细胞色素b基因的全序列，重建了代表9个中国种的32个标本的系统发育关系。最大简约、最大似然和贝叶斯分析产生了三个一致的树，每个树都有较高的引导值支持。结果表明，所含Niviventer种均为单系种。这9个种被划分为3个不同的分支：A支有Niviventer Brahma、N.confuianus、N.coxingi、A culturatus、N.EHA和N.fitivescens；B支有N.andsoni和N.Excelsior：C支有X cremoriventer。我们的结果还表明，中华绒毛虫应该是一个有效的物种，而不是一个亚种。根据中更新世中晚更新世(1.2-0.13Mya)的孔氏沼虾化石记录，标定了物种间的分化时间。结果表明，Niviventer属的第一次辐射事件发生在早更新世(约1.66 Mya)，其次是A和B分支的分歧约1.46 Mya。现存的Niviventer物种大多出现在早更新世至中更新世(约1.29-0.67 Mya)。这些分歧期与青藏高原、昆黄运动、更新世冰川和台湾海峡更新世形成的最后一次隆升事件重合。因此，地理事件和更新世冰川在Niviventer的多样化中发挥了巨大的作用。(C)2007 Elsevier Inc.保留所有权利。
Chinese species of the genus Niviventer, predominantly distributed in the southeastern Tibetan Plateau and in Taiwan, are a diverse group and have not yet received a thorough molecular phylogenetic analysis. Here, we reconstructed the phylogenetic relationships of 32 specimens representing nine Chinese species of Niviventer, based on sequences of the complete mitochondrial cytochrome b gene. Maximum parsimony, maximum likelihood and Bayesian analysis resulted in three consistent trees, each supported by high bootstrap values. The results showed that the Niviventer species included here are monophyletic. The nine species were classified into three distinct clades: clade A with Niviventer brahma, N. confucianus, N. coxingi, A culturatus, N. eha and N. fitIvescens; clade B with N. andersoni and N. excelsior: clade C with X cremoriventer. Our results also suggested that N. culturatus should be a valid species rather than a subspecies of A confucianus. Divergence times among species were calibrated according to the middle-late Pleistocene (1.2-0.13 Mya) fossil records of N confucianus. The results demonstrated that the first radiation event of the genus Niviventer occurred in early Pleistocene (about 1.66 Mya), followed by the divergence of clades A and B at about 1.46 Mya. Most of the extant Niviventer species appeared during early to middle Pleistocene (about 1.29-0.67 Mya). These divergence times are coincidental with the last uplift events of the Tibetan Plateau, Kun-Huang movement, Pleistocene glaciations and the vicariant formation of Taiwan Strait. Consequently geographical events and Pleistocene glaciations have played a great role in the diversification of Niviventer. (c) 2007 Elsevier Inc. All rights reserved.