title: Molecular evidence of Pleistocene bidirectional faunal exchange between Europe and the Near East: the case of the bicoloured shrew (Crocidura leucodon, Soricidae).
abstract: We sequenced 1077 bp of the mitochondrial cytochrome b gene and 511 bp of the nuclear Apolipoprotein B gene in bicoloured shrew (Crocidura leucodon, Soricidae) populations ranging from France to Georgia. The aims of the study were to identify the main genetic clades within this species and the influence of Pleistocene climatic variations on the respective clades. The mitochondrial analyses revealed a European clade distributed from France eastwards to north-western Turkey and a Near East clade distributed from Georgia to Romania; the two clades separated during the Middle Pleistocene. We clearly identified a population expansion after a bottleneck for the European clade based on mitochondrial and nuclear sequencing data; this expansion was not observed for the eastern clade. We hypothesize that the western population was confined to a small Italo-Balkanic refugium, whereas the eastern population subsisted in several refugia along the southern coast of the Black Sea.
authors: Department of Ecology and Evolution, University of Lausanne, Lausanne, Switzerland. sylvain.dubey@unil.ch
authors: S
authors: S
authors: Dubey
authors: J-F
authors: JF
authors: Cosson
authors: V
authors: V
authors: Vohralík
authors: B
authors: B
authors: Krystufek
authors: E
authors: E
authors: Diker
authors: P
authors: P
authors: Vogel
mesh_terms: D025041:Animal Migration; D000818:Animals; D001055:Apolipoproteins B / Q000737:chemistry / Q000235:genetics; D001483:Base Sequence; D005075:Biological Evolution; D045303:Cytochromes b / Q000737:chemistry / Q000235:genetics; D004272:DNA, Mitochondrial / Q000737:chemistry; D005060:Europe; D005843:Geography; D008877:Middle East; D008969:Molecular Sequence Data; D010802:Phylogeny; D011157:Population Dynamics; D017422:Sequence Analysis, DNA; D012788:Shrews / Q000033:anatomy & histology / Q000145:classification* / Q000235:genetics; D012934:Social Isolation
chemical_list: D001055:Apolipoproteins B; D004272:DNA, Mitochondrial; D045303:Cytochromes b