Cytonuclear Genetic Incompatibilities in Plant Speciation

Zoé Postel (1) , Pascal Touzet (1)

1 Evo-Eco-Paléo (EEP) - Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198

Due to the endosymbiotic origin of organelles, a pattern of coevolution and coadaptation between organellar and nuclear genomes is required for proper cell function. In this review, we focus on the impact of cytonuclear interaction on the reproductive isolation of plant species. We give examples of cases where species exhibit barriers to reproduction which involve plastid-nuclear or mito-nuclear genetic incompatibilities, and describe the evolutionary processes at play. We also discuss potential mechanisms of hybrid fitness recovery such as paternal leakage. Finally, we point out the possible interplay between plant mating systems and cytonuclear coevolution, and its consequence on plant speciation.

Mots clés: cytonuclear interactions; intergenomic conflict; reproductive isolation; coevolution

Domaines: Génétique des populations [q-bio.PE]

Zoé Postel, Pascal Touzet. Cytonuclear Genetic Incompatibilities in Plant Speciation. Plants, 2020, ⟨10.3390/plants9040487⟩. ⟨hal-02784378⟩