A population genetic study on the relationship between medaka fish and the spread of wet-rice cultivation across the Japanese archipelago

Bibliographic Data

ID6135415
AuthorsTakafumi Katsumura (0000-0001-7192-150X, Department of Integrated Biosciences, Graduate School of Frontier Sciences, University of Tokyo, Kashiwa), Shoji Oda (0000-0002-7495-5913, Department of Integrated Biosciences, Graduate School of Frontier Sciences, University of Tokyo, Kashiwa), K Tsukamoto (0000-0003-0544-9811, Fujita Health University), Yoshio Sekiya (Department of Integrated Biosciences, Graduate School of Frontier Sciences, University of Tokyo, Kashiwa), Toshikazu Yamashita (Department of Integrated Biosciences, Graduate School of Frontier Sciences, University of Tokyo, Kashiwa), Masanori Aso (Department of Integrated Biosciences, Graduate School of Frontier Sciences, University of Tokyo, Kashiwa), Masayoshi Hata (International Coastal Research Center, Ocean Research Institute, University of Tokyo, Otsuchi), Masaru Nonaka (Department of Biological Science, Graduate School of Science, University of Tokyo, Tokyo), Shuhei Mano (0000-0002-9273-3812, The Institute of Statistical Mathematics), Hajime Ishida (0000-0002-5781-7914, Department of Human Biology and Anatomy, University of the Ryukyus Faculty of Medicine, Nishihara), Hiroshi Mitani (0000-0003-0167-3816, Department of Integrated Biosciences, Graduate School of Frontier Sciences, University of Tokyo, Kashiwa), Shoji Kawamura (0000-0003-0350-6050, Department of Integrated Biosciences, Graduate School of Frontier Sciences, University of Tokyo, Kashiwa), Hiroki Oota (0000-0003-0746-2729, Department of Anatomy, Kitasato University School of Medicine, Sagamihara)
Year2011
Volume120
Issue1
Pages81-89
Publication date2011-10-10
Open AccessYes
TypeARTICLE
VenueAnthropological Science (JOURNAL)
Journal identifiersISSN: 0918-7960 • E-ISSN: 1348-8570
PublisherAnthropological Society of Nippon (PUBLISHER • JP)
DOI10.1537/ase.110525
OpenAlexW2063969600
LanguageEN
Citations received1
References cited33

It has been generally thought that a tiny freshwater fish, medaka (Oryzias latipes), has expanded its habitat into the Japanese archipelago as wet-rice cultivation spread across the region, and hence the distribution of medaka should be a matter of anthropological interest. However, there has been no study to verify this popular belief. To address the issue, we sampled wild medaka, and undertook genetic analyses of its populations. We collected 976 individual medaka from 13 local wild sites, which included 11 paddy-field irrigation channels and two ponds. The gene tree constructed based on nucleotide sequences of mitochondrial genome D-loop region showed no discrepancy in the topology, which is presumed to reflect the northern Kyushu origin of the southern Japanese medaka. Population genetic statistics indicated that the medaka populations in west Japan have greater genetic diversity (heterozygosity) than those in east Japan, supporting the hypothesis that the medaka originate from northern Kyushu. Hence, we argue that the current medaka distribution can be attributed to their past migration event(s) following the expansion of paddy fields from northern Kyushu to the eastern part of the Japanese archipelago

Archipelago · Biology · Gene · Genetic diversity · Oryzias · Phylogenetic tree · Population · Zoology · Demography · Forensic and Genetic Research · Genetic diversity and population structure · Identification and Quantification in Food · Ecology · Genetics

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