Molecular phylogeny of wood mice (Apodemus, Muridae) in East Asia

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Sequences of the mitochondrial cytochrome b (1140 bp) and nuclear IRBP (1152 bp) genes were used to assess the evolutionary history of Apodemus, using the complete set of Asian species. Our results indicate that speciation in Asia involved three radiations, which supports an earlier study. The initial radiation yielded A. argenteus (Japanese endemic), A. gurkha (Nepalese endemic), and the ancestral lineage of the remaining Asian species. This lineage subsequently diverged into four groups: agrarius-chevrieri (agrarius group), draco-latronum-semotus (draco group), A. peninsulae, and A. speciosus (Japanese endemic). The final step consisted of divergence within two species groups as a consequence of the geography of the Yunnan-Guizhou plateau and Taiwan. The ecological ability of two Apodemus species  to  inhabit  one  locality  via  niche  partitioning  likely  drove  the  second  radiation  and  shaped  the basic geographical pattern seen today: A. argenteus and A. speciosus in Japan, A. agrarius and A. peninsulae in northern China, and the A. agrarius and A. draco groups in southern China. The three radiations are estimated to have occurred 7.5, 6.6, and 1.8–0.8 Mya respectively, using the IRBP clock, based on rat–mouse divergence 12 Mya. © 2003 The Linnean Society of London, Biological Journal of the Linnean Society, 2003, 80, 469–481.

Keywords: IRBP; Yunnan-Guizhou plateau; biogeography; cytochrome b; field mice; niche partitioning

Document Type: Research Article


Affiliations: 1: Laboratory of Ecology and Genetics, Graduate School of Environmental Earth Science, Hokkaido University, Kita-ku, Sapporo 060–0810, Japan 2: Experimental Animal Center, Miyazaki Medical College, Kiyotake, Miyazaki 889–1692, Japan 3: Laboratory of Molecular Evolution and Genome Diversity, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650223, China 4: Division of Mammalogy, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650223, China

Publication date: November 1, 2003

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