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Mitochondrial Phylogeography and Population History of the Large Japanese Wood Mouse (Apodemus speciosus) on Sado Island, Japan

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Title: Mitochondrial Phylogeography and Population History of the Large Japanese Wood Mouse (Apodemus speciosus) on Sado Island, Japan
Authors: Tomozawa, Morihiko Browse this author
Tomida, Hiroshi Browse this author
Suzuki, Hitoshi Browse this author →KAKEN DB
Tsuchiya, Kimiyuki Browse this author
Keywords: Apodemus speciosus
Bayesian coalescent analysis
phylogeography
Pleistocene sea-level change
Sado Island
Issue Date: Jun-2010
Publisher: Mammalogical Society of Japan
Journal Title: Mammal Study
Volume: 35
Issue: 2
Start Page: 93
End Page: 97
Publisher DOI: 10.3106/041.035.0206
Abstract: A phylogeographic study of the large Japanese wood mouse, Apodemus speciosus, on Sado Island, Japan, was performed based on sequences of the mitochondrial cytochrome b gene (1,140 bp). Our previous study covered the entire species range and suggested that the mice on Sado Island are monophyletic, exhibiting two well diverged lineages throughout the island. The present data also supported two lineages (the average number of nucleotide difference was 11.4), showing a weak phylogeographic structure. Given the high sequence divergence observed, we assumed historically subdivided populations within the island. Bayesian coalescent analysis supported a dual-population model rather than that of one large population. The times to most recent common ancestor of all sequences were 293,000 years ago [ka; 95% highest probability density (HPD) 85-634 ka] and 292 ka (HPD 102-605 ka) for the one- and dual-population models, respectively. These results suggest that the populations have undergone repeated separations and reconnections, rather than being subdivided completely through time. Our results are in accordance with other paleogeographic and phylogeographic evidence from the island. The present study highlighted a unique system of producing and maintaining genetic diversity and suggested prehistoric colonization of the A. speciosus population on Sado Island, thus supporting the ancient origin of the mammalian fauna of Sado Island.
Type: article
URI: http://hdl.handle.net/2115/48308
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 鈴木 仁

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