Data from: Systematics of snow voles (Chionomys, Arvicolinae) revisited

To elucidate the evolutionary history of snow voles, genus Chionomys, we studied the phylogeography of Chionomys nivalis across its range and investigated its relationships with two congeneric species, C. gud and C. roberti, using independent molecular markers. Analyses were based on mitochondrial (~940 bp cyt b) and Y-chromosomal (~2020 bp from three introns) genetic variation. Our data provide conclusive evidence for a Caucasian and Middle Eastern origin for the three species and a subsequent westward expansion of C. nivalis. In addition, we discuss the taxonomic status of the genus Chionomys in relation to the genus Microtus.为阐明雪田鼠属（Chionomys）的演化历史，本研究针对全分布范围内的雪田鼠（Chionomys nivalis）开展系统地理学研究，并利用独立分子标记，分析其与另外两个同属物种——古氏雪田鼠（C. gud）与罗伯特雪田鼠（C. roberti）——的演化关系。本研究的分析基于线粒体遗传变异（约940 bp的细胞色素b（cyt b）基因片段）与Y染色体遗传变异（来自3个内含子的约2020 bp片段）。本研究数据为该三物种的高加索与中东起源，以及雪田鼠（C. nivalis）后续的向西扩散提供了确凿证据。此外，本研究还探讨了雪田鼠属（Chionomys）与田鼠属（Microtus）之间的分类学地位关联。