| 要旨トップ | 目次 | | 日本生態学会第73回全国大会 (2026年3月、京都) 講演要旨 ESJ73 Abstract

一般講演（ポスター発表） P1-526 （Poster presentation）

#### 分裂酵母Schizosaccharomyces pombeの非対称な交配相手認識精度の進化的形成を探る【A】
Evolutionary Symmetry Breaking of Matching Strategies via an Agent-Based Model【A】

*北條拓也（東京大学大学院, 理化学研究所）, 古澤力（東京大学大学院, 理化学研究所）
*Takuya HOJO（The Univ. of Tokyo, RIKEN BDR）, Chikara FURUSAWA（The Univ. of Tokyo, RIKEN BDR）

Many organisms increase their population through sexual reproduction. For sexual reproduction success, individuals of the same species with different mating types must recognise each other accurately. Recently, it has been reported that the eukaryotic fission yeast Schizosaccharomyces pombe possesses a bidirectional ligand-receptor recognition system in which one side is stringent and another is loose. Interestingly, this asymmetric recognition system has also been observed in other species, some of which have the roles reversed. This system has been discussed as a potential contributor to diversification in sympatric speciation. However, the origin of this system remains unclear. When investigating this, we found that this system spontaneously emerges from a population genetics-based mathematical model that assumes external environmental fluctuations and population-dependent effects. This suggests the existence of a universal rule governing the formation of such an asymmetric recognition system in sexual reproduction.

日本生態学会