祖先の一夫一妻制は,親族の選択がユーソシアリティの進化の鍵であることを示しています
William O H Hughes1, Benjamin P Oldroyd, Madeleine Beekman
1Institute of Integrative and Comparative Biology, University of Leeds, Leeds, LS2 9JT, UK. w.o.h.hughes@leeds.ac.uk
まとめ
単一雄との交配である一夫一妻制は,ミツバチ,ホープス,アリのユーソシアルの進化に決定的であった. 多発性交配は後に進化し,労働者の生殖能力の制限と関連しています.
科学分野:
- 進化生物学の進化生物学について
- 行動生態学 行動生態学
- 社会的な昆虫は,社会的な昆虫です.
背景:
- 密接な遺伝的関連性は,伝統的に,ユーソシアリティの進化の前提条件として見られています.
- 最近の仮説では,親密な親族関係がユーソシアリティの原動力ではなく,結果である可能性があると提案しています.
研究 の 目的:
- ユーソシアリティの進化的起源における交配頻度の役割を調査する.
- モノガミやポリアンドリーがユーソシアルな昆虫の祖先であるかどうかをテストする.
主な方法:
- 267種のユーソシアルミツバチ,ホープス,アリにおけるメスの交配頻度の比較分析.
- 8つの独立したエウソシアル系統における交配行動の祖先状態を決定するための系統再構築.
主要な成果:
- モノガミ (単一交配) は,調査された8つのエウソシアルな昆虫系統のすべてにおいて,祖先の交配戦略である.
- 多妻制 (複数交配) は,二次的に進化した,派生的な特徴です.
- 高ポリアンドリーは,特に労働者が生殖能力の全力を失った系統と関連付けられています.
結論:
- この発見は,ユーソシアリティの進化における一夫一妻制の重要な役割を支持する最初の経験的証拠を提供します.
- 結果は,社交性の起源に関するインクルーシブフィットネス理論からの予測と一致し,強化しています.
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