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How to avoid self-fertiliization: clarifying its evolution

Research Project

Project/Area Number 16H04837
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Ecology/Environment
Research InstitutionTohoku University

Principal Investigator

Sakai Satoki  東北大学, 生命科学研究科, 准教授 (90272004)

Co-Investigator(Kenkyū-buntansha) 牧 雅之  東北大学, 学術資源研究公開センター, 教授 (60263985)
Research Collaborator Itagaki Tomoyuki  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2018: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2017: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
Fiscal Year 2016: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Keywords近交弱勢 / 近親交配 / 自殖 / 自殖率 / 自家不和合性 / 自家和合性 / 被子植物
Outline of Final Research Achievements

To avoid self-fertilization, two types of self-incompatibilities, herkogamy, and dichogamy have evolved. I examined the evolution of these strategies, particularly examining self-incompatibilities.
I proposed a new hypothesis that self-incompatibilities have evolved not to avoid self-fertilization but to avoid kin-fertilization.

Academic Significance and Societal Importance of the Research Achievements

自家不和合性は、生物学における重要な研究対象となっている。本研究で提唱した、自殖というよりも近親交配を避けるために進化したという説は、これまでの研究を大きく変えうるものである。自殖に関するこれまでの研究では、近親交配の影響はほとんど見過ごされてきた。本研究により、近親交配の影響を調べる研究が加速的に進むと期待される。
配偶体型または胞子体型の自家不和合性・雌雄離熟・雌雄異熟に着目し、それらの進化を統一的に理解するという試みもこれまで行われてこなかった。これらを統合した本研究により、近交弱勢を避ける戦略の進化の理解が大きく進展すると考えている。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (3 results)

All 2018 2017

All Journal Article (2 results) (of which Peer Reviewed: 1 results) Presentation (1 results)

  • [Journal Article] Intra-flower variation in nectar secretion: secretion patterns and pollinator behavior in male- and female-phase flowers2018

    • Author(s)
      Misaki, A., Itagaki, T., Matsubara, Y., and Sakai, S.
    • Journal Title

      American Journal of Botany

      Volume: 105 Pages: 842-850

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Floral induced and constitutive defense against florivory: comparison of chemical traits in 12 herb species2018

    • Author(s)
      Wakabayashi, K., Oguro, M., Itagaki, T., and Sakai, S.
    • Journal Title

      Plant Ecology

      Volume: 219 Pages: 985-997

    • Related Report
      2018 Annual Research Report
  • [Presentation] 適応的な近交弱勢:自殖集団において有害遺伝子が蓄積される要因の新仮説2017

    • Author(s)
      酒井聡樹
    • Organizer
      日本生態学会
    • Place of Presentation
      早稲田大学(東京都新宿区)
    • Year and Date
      2017-03-14
    • Related Report
      2016 Annual Research Report

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Published: 2016-04-21   Modified: 2020-03-30  

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