Molecular phylogeography of the brown bear (Ursus arctos) in Northeastern Asia based on analyses of complete mitochondrial DNA sequences - PubMed (original) (raw)

. 2013 Jul;30(7):1644-52.

doi: 10.1093/molbev/mst077. Epub 2013 Apr 25.

Tsutomu Mano, Alexei V Abramov, Gennady F Baryshnikov, Pavel A Kosintsev, Alexandr A Vorobiev, Evgeny G Raichev, Hiroshi Tsunoda, Yayoi Kaneko, Koichi Murata, Daisuke Fukui, Ryuichi Masuda

Affiliations

• PMID: 23619144
• DOI: 10.1093/molbev/mst077

Molecular phylogeography of the brown bear (Ursus arctos) in Northeastern Asia based on analyses of complete mitochondrial DNA sequences

Daisuke Hirata et al. Mol Biol Evol. 2013 Jul.

Abstract

To further elucidate the migration history of the brown bears (Ursus arctos) on Hokkaido Island, Japan, we analyzed the complete mitochondrial DNA (mtDNA) sequences of 35 brown bears from Hokkaido, the southern Kuril Islands (Etorofu and Kunashiri), Sakhalin Island, and the Eurasian Continent (continental Russia, Bulgaria, and Tibet), and those of four polar bears. Based on these sequences, we reconstructed the maternal phylogeny of the brown bear and estimated divergence times to investigate the timing of brown bear migrations, especially in northeastern Eurasia. Our gene tree showed the mtDNA haplotypes of all 73 brown and polar bears to be divided into eight divergent lineages. The brown bear on Hokkaido was divided into three lineages (central, eastern, and southern). The Sakhalin brown bear grouped with eastern European and western Alaskan brown bears. Etorofu and Kunashiri brown bears were closely related to eastern Hokkaido brown bears and could have diverged from the eastern Hokkaido lineage after formation of the channel between Hokkaido and the southern Kuril Islands. Tibetan brown bears diverged early in the eastern lineage. Southern Hokkaido brown bears were closely related to North American brown bears.

Keywords: Hokkaido; Ursus arctos; brown bear; complete mitochondrial DNA; phylogeography.

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