New molecular data shed light on the global phylogeny and species limits of the Rhipicephalus sanguineus complex
New molecular data shed light on the global phylogeny and species limits of the Rhipicephalus sanguineus complex
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DOI：
10.1016/j.ttbdis.2016.03.014
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发表时间：
2016-01-01
影响因子：
3.2
通讯作者：
Estrada-Pena, Agustin
中科院分区：
文献类型：
--
作者：
Hekimoglu, Olcay;Saglam, Ismail K.;Estrada-Pena, Agustin
血蜱复合体是一群分布在世界各地的密切相关的蜱类。本研究利用线粒体16S核糖体DNA，对来自土耳其的新血猴和来自肯尼亚的camicasi Rhipicephalus进行了评估，并在GenBank中对该复合体的现有序列进行了评估。我们的目标是划定复杂，重新评估其全球系统发育和发展其生物地理历史的重建。考虑到土耳其的地理位置及其在非洲、亚洲和欧洲的邻近地位，该地区的血鼠分子信息可能在区域和全球范围内具有重要意义。三种方法（Bayesian、Maximum Likelihood和Maximum Parsimony）得到的系统发育树高度相似，共识树给出了相同的分支模式和相似的节点支持值。共有4个不同的分支，多达9个操作分类单位，形成了强大的单系群。生物地理学重建证明了中东（土耳其）种群在该群体从欧洲向非洲和亚洲传播中的重要性。这些数据支持了先前关于在南美洲存在两种血种的结论，以及camicasi血种与所谓的热带血种谱系之间具有很强的分子相似性。这些结果表明，在对该分类群进行充分的重新描述之后，需要对东欧、中东、非洲和亚洲的大多数被指定为血种的标本进行重新评估。(C) 2016 Elsevier GmbH版权所有。
The Rhipicephalus sanguineus complex is a group of closely related tick species distributed all around the world. In this study, using mitochondrial 16S ribosomal DNA, new specimens of R sanguineus sensu lato from Turkey and Rhipicephalus camicasi from Kenya, were evaluated together with available sequences of this complex in GenBank. Our objectives were to delimit the complex, re-evaluate its global phylogeny and develop a reconstruction of its biogeographic history. Given Turkey's geographical location and its neighboring status within Africa, Asia and Europe, molecular information of R. sanguineus s.l. species from this region could have important implications both on a regional and global scale. Phylogenetic trees obtained with three methods (Bayesian, Maximum Likelihood and Maximum Parsimony) were highly similar and consensus trees gave the same branching patterns and similar node support values. A total of four different clades with up to 9 Operational Taxonomic Units formed strong monophyletic groups. Biogeographic reconstructions demonstrated the importance of populations in Middle East (Turkey) in the spread of the group from Europe to Africa and Asia. Data supported previous conclusions on the existence of two species of R. sanguineus s.l. in South America and the strong molecular similarity between R. camicasi and the so-called tropical lineage of R. sanguineus s.l. These results point to the need of a re-evaluation of most specimens designated as R. sanguineus s.l. in East Europe, Middle East, Africa and Asia after an adequate re-description of this taxon. (C) 2016 Elsevier GmbH. All rights reserved.