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The evolution of biological hierarchy reinforced by intraspecific parasitism: a test with social insects

Research Project

Project/Area Number 21H02537
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 45020:Evolutionary biology-related
Research InstitutionThe University of Tokyo

Principal Investigator

Dobata Shigeto  東京大学, 大学院総合文化研究科, 准教授 (50714995)

Co-Investigator(Kenkyū-buntansha) 北條 賢  関西学院大学, 生命環境学部, 教授 (70722122)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2023: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2022: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2021: ¥11,050,000 (Direct Cost: ¥8,500,000、Indirect Cost: ¥2,550,000)
Keywords階層性進化 / 社会性昆虫 / ゲノミクス / 比較ゲノミクス / 種内寄生
Outline of Research at the Start

本課題では,多細胞性や真社会性など生物界にみられる高度な複雑性の進化的駆動力となった「階層性の進化」に焦点を当てる.下位階層で生じる種内寄生が上位階層の統合性の強化に積極的な役割を果たしたとする仮説を立て,種内寄生が存在する社会性昆虫アミメアリを用いた実証研究を展開する.寄生系統と通常系統の比較オミクス解析,寄生への対抗戦略としての巣仲間識別の行動解析を行い,社会性昆虫の女王カースト分化の分子基盤や,生物階層を超えた生命の共通原理の深い理解を目指す.

Outline of Final Research Achievements

We conducted an empirical study using a social insect Pristomyrmex punctatus, which harbors intraspecific social parasites, in order to gain insight into the common principles in the evolution of biological hierarchies,. We obtained high-quality reference genomes of socially parasitic (cheater) and normal lineages, compared gene expression among lineages, and analyzed nestmate discrimination behavior as an integral part of colony hierarchy. The results suggest that the cheater lineage has co-opted queen traits from their ancestor species, and that when the cheaters invade other colonies, the hosting colony exhibits normal nest-mate discrimination behavior to exclude the invaders. These results will provide basic information for elucidating the evolutionary maintenance mechanisms of social systems and the molecular basis of caste differentiation in social insects.

Academic Significance and Societal Importance of the Research Achievements

本研究が対象とした社会寄生現象の進化は,社会性昆虫の事例研究にとどまらず,生物の社会システムの起源・維持に関して,生物階層を問わない一般性を持ちうるものである.例えば,微生物集団のふるまいや,がん細胞の小進化プロセス,さらに人間社会の進化史的な成立においても,社会寄生者の問題は存在する.社会性昆虫の研究に絞っても,社会寄生系統は,野外で進化した「女王変異体」とみなすことが可能であるため,通常は表現型可塑性で生じる社会性昆虫の階級分化の分子メカニズムの理解に,新たなアプローチを与えることが期待される.

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (19 results)

All 2024 2023 2022 2021

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (17 results) (of which Int'l Joint Research: 9 results,  Invited: 5 results)

  • [Journal Article] Morphology of immatures of the thelytokous ant, Monomorium triviale Wheeler (Formicidae: Myrmicinae: Solenopsidini) with descriptions of the extraordinary last-instar queen larvae2022

    • Author(s)
      IDOGAWA NAOTO、GOTOH AYAKO、DOBATA SHIGETO
    • Journal Title

      Zootaxa

      Volume: 5105 Issue: 2 Pages: 253-268

    • DOI

      10.11646/zootaxa.5105.2.5

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The build-up of dominance hierarchies in eusocial insects2022

    • Author(s)
      Shimoji Hiroyuki、Dobata Shigeto
    • Journal Title

      Philosophical Transactions of the Royal Society B: Biological Sciences

      Volume: 377 Issue: 1845 Pages: 20200437-20200437

    • DOI

      10.1098/rstb.2020.0437

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] Behavioral Analysis of Ant Colonies: Distinguishing Between Stochastic/Deterministic Modes and Global Behavior2024

    • Author(s)
      Norihiro Maruyama, Shigeto Dobata, Takashi Ikegami
    • Organizer
      AROB-ISBC-SWARM 2024
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 個体・巣・多巣性コロニー:単為生殖アリの社会における多階層モジュール性2024

    • Author(s)
      井戸川直人・永野惇・土畑重人
    • Organizer
      第71回日本生態学会大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 拘束か誘引か:巣仲間の化学的痕跡がアリの行動に及ぼす影響2024

    • Author(s)
      兼田典佳・土畑重人
    • Organizer
      第71回日本生態学会大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 個体間相互作用が生み出す集団内異質性とその進化的帰結:社会性昆虫での事例2024

    • Author(s)
      土畑重人
    • Organizer
      第71回日本生態学会大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Emergence of Differentiation of Deterministic/Stochastic Behavior in Ants’ Collectives2023

    • Author(s)
      Norihiro Maruyama, Michael Crosscombe, Shigeto Dobata, Takashi Ikegami
    • Organizer
      2023 Artificial Life Conference (ALIFE)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Sociogenetic structures of two parthenogenetic ants with contrasting modes of colony reproduction2023

    • Author(s)
      Naoto Idogawa, Atsushi J. Nagano, Shigeto Dobata
    • Organizer
      日本進化学会第25回大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] ゲノムワイドSNP情報から階層的自然選択の遺伝基盤を定量する2023

    • Author(s)
      土畑重人・渡邊薫・永野惇
    • Organizer
      日本進化学会第25回大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Comparative sociogenetics in two parthenogenetic ants with contrasting dispersal strategies2023

    • Author(s)
      Naoto Idogawa, Atsushi J. Nagano, Shigeto Dobata
    • Organizer
      IUSSI North-West Europe section
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Emergence of Individuality and the Self-organization of the Collective: The epsilon transducer analysis of an ant colony2023

    • Author(s)
      Norihiro Maruyama, Michael Crosscombe, Shigeto Dobata, Takashi Ikegami
    • Organizer
      AROB-ISBC-SWARM 2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Spontaneous aggregation behaviors in the ant Pristomyrmex punctatus2022

    • Author(s)
      Norika Kaneda, Shigeto Dobata
    • Organizer
      ASAB Hublet (Asia)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Quantifying multilevel selection in a male-free, queenless and annual ant species2022

    • Author(s)
      Shigeto Dobata
    • Organizer
      IUSSI 2022: International Union for the Study of Social Insects
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 被食・捕食系の生態-進化ダイナミクスにおける種間の遺伝共分散の効果2022

    • Author(s)
      土畑重人
    • Organizer
      第38回個体群生態学会大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Quantifying social dilemma in ant societies2022

    • Author(s)
      Shigeto Dobata
    • Organizer
      ICMMA 2021 International Conference on "Emergence of Cooperation and Organization in Groups of Animals and Non-living Objects"
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Emergence and collapse of frozen clusters in experimental ant (Pristomyrmex punctatus) groups2022

    • Author(s)
      Shigeto Dobata, Norihiro Maruyama, Itsuki Doi, and Takashi Ikegami
    • Organizer
      AROB-ISBC-SWARM 2022
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 「超個体」はいかにして進化するのか2022

    • Author(s)
      土畑重人
    • Organizer
      第69回日本生態学会大会 第26回 日本生態学会宮地賞受賞講演
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Social insects as a model system of adaptive complexity2021

    • Author(s)
      Shigeto Dobata
    • Organizer
      RIMS Workshop "Toward an integration of fluids, ecology, and evolution"
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] アリのワーカーが持つ繁殖ポテンシャルがタスク選択に与える影響2021

    • Author(s)
      田中康就,土畑重人,辻和希,下地博之
    • Organizer
      第40回日本動物行動学会大会
    • Related Report
      2021 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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