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Molecular phylogenetics and phylogeographic structure of Sorex bedfordiae based on mitochondrial and nuclear DNA sequences.

Abstract：

:The southeastern margin of the Tibetan Plateau is characterized by complex topography and a discontinuous landscape, creating a sky island situation. However, the way topography shapes genetic structures and demographic histories of endemic species has not been well studied. We examined the phylogeographic pattern and demographic histories of Sorex bedfordiae, a dispersal-limited small mammal, using three nuclear genes [1977bp] and two mitochondrial genes [1794bp] with comprehensive molecular approaches. We recovered five well-supported clades whose distributions are along mountain ridges and roughly subdivided by large rivers. Demographic expansions in the middle Pleistocene were strongly supported by both nuclear and mitochondrial genes. Our results support the hypothesis that sky island topography and river systems strongly affect the genetic structure of non-aquatic terrestrial species. We further clarify that S. bedfordiae and S. cylindricauda are valid sibling species, whereas S. excelsus is most likely a geographic subspecies of S. bedfordiae.

journal_name

Mol Phylogenet Evol

journal_title

Molecular phylogenetics and evolution

authors

Chen S,Sun Z,He K,Jiang X,Liu Y,Koju NP,Zhang X,Tu F,Fan Z,Liu S,Yue B

doi

10.1016/j.ympev.2014.12.016

subject

Has Abstract

pub_date

2015-03-01 00:00:00

pages

245-53

eissn

1055-7903

issn

1095-9513

pii

S1055-7903(15)00003-2

journal_volume

84

pub_type

杂志文章

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