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Genetic basis of adaptive traits in stream salmonids: toward a large scale population genomics

Research Project

Project/Area Number 18K06405
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 45040:Ecology and environment-related
Research InstitutionHokkaido University

Principal Investigator

Koizumi Itsuro  北海道大学, 地球環境科学研究院, 准教授 (50572799)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2018: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords繁殖時期 / 回遊多型 / 小進化 / 局所適応 / サケ科魚類 / メタ個体群 / 適応進化 / 遺伝的基盤 / 生態-進化動態 / 集団ゲノム学 / 河川性サケ科魚類
Outline of Final Research Achievements

This research established an effective population genomic framework using a model system where long-term ecological data has been accumulated in 50 local populations over the last two decades. I examined large dataset and selected 78 individuals from populations above vs. below physical barriers and with early vs. late reproductive timing. Low coverage whole genome sequence suggested a few candidate genes for affecting residency vs. migratory, as well as for reproductive timing. This enables a cost-effective large scale population genomic analysis by reduced-representation sequencing.

Academic Significance and Societal Importance of the Research Achievements

次世代シーケンサー(NGS)の普及により非モデル生物でもゲノム構造や適応遺伝子が調べられるようになってきた。しかし、NGS解析はいまだ高額であり、数万個体の解析はあまり現実的ではない。近年、1個体当たり多数の遺伝子座を読むのではなく、遺伝子座を絞って多数個体を解析するreduced representation sequencingという手法が考案された。本研究では、20年50個体群以上で詳細な生態データが蓄積されている調査系において、本手法を行う基盤を整えた。これにより今後数万個体規模で適応遺伝子と個体群動態を付き合わせて解析することで、野外における小進化過程を解明することが期待できる。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (5 results)

All 2020 2019

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results) Book (4 results)

  • [Journal Article] Temperature-dependent competition between juvenile salmonids in small streams2019

    • Author(s)
      Watz, J., Ohtsuki, Y., Nagatsuka, K., Hasegawa, K. & Koizumi
    • Journal Title

      Freshwater Biology

      Volume: 64 Issue: 8 Pages: 1534-1541

    • DOI

      10.1111/fwb.13325

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Book] 第3章「想像を超えたヒグマとサケの繋がり:互いに影響する生態と進化、そして生態系全体へ」 書名「ヒグマ学への招待ー自然と文化で考える」2020

    • Author(s)
      小泉逸郎
    • Total Pages
      384
    • Publisher
      北海道大学出版会
    • ISBN
      9784832974159
    • Related Report
      2019 Research-status Report
  • [Book] Chapter 5. Trout and char: taxonomy, systematics, and phylogeography (Book title: Trout and Char of the World)2019

    • Author(s)
      Whiteley AR, Penaluna BE, Taylor EB, Weiss S, Abadia-Cardoso A, Gomez-Uchida D, Koizumi I, Trotter P
    • Total Pages
      777
    • Publisher
      American Fisheries Society
    • ISBN
      9781934874547
    • Related Report
      2019 Research-status Report
  • [Book] Chapter 21. Global Status of Trout and Char: Conservation Challenges in the Twenty-First Century (Book title: Trout and Char of the World)2019

    • Author(s)
      Muhlfeld CC, Dauwalter DC, D’Angelo VS, Ferguson A, Giersch J, Impson D, Koizumi I, Kovach RP, McGinnity P, Schoeffmann J, Vollestad LA and Epifanio J
    • Total Pages
      777
    • Publisher
      American Fisheries Society
    • ISBN
      9781934874547
    • Related Report
      2019 Research-status Report
  • [Book] 第4章「代替生活史戦術と個体群動態ー行動学的基盤の視点からー」 書名「遺伝子・多様性・循環の科学: 生態学の領域融合へ」2019

    • Author(s)
      立木佑弥・堀田淳之介・小泉逸郎
    • Total Pages
      446
    • Publisher
      京都大学学術出版会
    • ISBN
      9784814001903
    • Related Report
      2019 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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