On the phylogenetic position of a rare Iberian endemic mammal, the Pyrenean desman (Galemys pyrenaicus)

被引:46
作者
Cabria, Maria Teresa
Rubines, Jonathan
Gomez-Moliner, Benjamin
Zardoya, Rafael
机构
[1] Museo Nacl Ciencias Nat, CSIC, Dept Biodiversidad & Biol Evolut, Madrid 28006, Spain
[2] Univ Basque Country, Fac Farm, Dept Zool, Vitoria 01006, Spain
关键词
Talpidae; Eulipotyphla; Laurasiatheria; mitochondrial genome; nuclear genes;
D O I
10.1016/j.gene.2006.01.038
中图分类号
Q3 [遗传学];
学科分类号
071007 ; 090102 ;
摘要
The nucleotide sequences of the complete mitochondrial genome and nine partial nuclear genes of the Pyrenean desman (Galemys pyrenaicus) were determined in order to establish the relative phylogenetic position of this species at different taxonomic levels within the placental tree. Phylogenctic relationships of desman within the family Talpidae were inferred based on complete mitochondrial cytochrome b gene nucleotide sequence data. The Pyrenean desman was unambiguously recovered as sister group of the Russian desman (Desmana nioschata) confirming the monophyly of the subfamily Desmaninae. However, phylogenetic relationships among major lineages within the Talpidae could not be confidently resolved. Phylogenetic analyses based on mitochondrial (at the amino acid level) and nuclear (at the nucleotide level) sequence data sets confidently placed desman within the Eulipotyphla (that also included moles, shrews, and hedgehogs), and partially recovered placental interordinal relationships. The monophyly of Laurasiatheria (including Eulipotyphla, Chiroptera, Carnivora, Pholidota, Perissodactyla, and Cetartiodactyla) was strongly supported. Mitochondrial amino acid sequences of Pholidota (pangolins) were found to bias phylogenetic inferences due to long-branch attraction effects. A Bayesian inference based on a combined initochondrial and nuclear data set without Pholidota arrived at an almost fully resolved tree that supported the basal position of Eulipotyphla within Laurasiatheria. (c) 2006 Elsevier B.V. All rights reserved.
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页码:1 / 13
页数:13
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