2022 Fiscal Year Final Research Report
Conservation genomics of freshwater fish: building a framework linking natural history and threat diagnosis
| Project/Area Number |
20H03009
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 39060:Conservation of biological resources-related
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
小北 智之 九州大学, 農学研究院, 教授 (60372835)
武島 弘彦 福井県立大学, 海洋生物資源学部, 客員研究員 (50573086)
橋口 康之 大阪医科薬科大学, 医学部, 講師 (70436517)
田畑 諒一 滋賀県立琵琶湖博物館, 研究部, 学芸員 (00793308)
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 保全遺伝学 / 淡水魚類 / ゲノム分析 / 小集団化 / 適応 |
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| Outline of Final Research Achievements |
This study conducted the following conservation genomics research on freshwater fishes based on whole-genome analysis. (1) The natural history of wild populations was reconstructed and genomic changes in captive populations were estimated for three endangered species. (2) Adaptation and conservation challenges associated with interspecific hybridization were investigated by elucidating the extent of adaptive gene introgression in the cottid species and establishing baseline information through whole-genome sequencing of the species that hybridized with Hinamoroko. (3) To improve our understanding of the adaptive significance of genetic diversity, the study identified the causal genetic variation responsible for color polymorphism in the gudgeon species in Lake Biwa and comprehensively elucidated its spatiotemporal dynamics and adaptation. Through these investigations, this research facilitated the integration of natural history research and conservation practice in the genomic era.
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| Free Research Field |
進化生物学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究は、淡水魚類を対象に、ゲノム時代の新しい自然史研究を推し進め、現代社会の重要課題である生物多様性の保全に結び付けることを試みたものである。日進月歩の進展をみせる分析技術やデータ解析手法のもとで、本研究は新規に決定した3種を含む6種の全ゲノム配列を利用し、これまでにない精度で分布域形成や集団動態の歴史を再構築し、種間交雑や遺伝的多様性の適応的な意義や自然下での実態について、身近な淡水魚類を対象に明らかにした。今後の非モデル生物における進化ゲノミクス研究の可能性を拡げるとともに、生息域内、生息域外における今後の保全施策につながる成果を含んでいる。
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