The homomorphic self-incompatibility system in Oleaceae is controlled by a hemizygous genomic region expressing a gibberellin pathway gene

We describe complete association between the presence/absence of this gene and the SI types determined for individuals of seven distantly related Oleaceae species. This gene is predicted to be involved in catabolism of the gibberellic acid (GA) hormone, and experimental manipulation of GA levels in developing buds modified the male and female SI responses of the two specificities in different ways. Our results provide a unique example of a homomorphic SI system, where a single conserved gibberellin-related gene in a hemizygous indel underlies the long-term maintenance of two groups of reproductive compatibility.PMID:38626763 | DOI:10.1016/j.cub.2024.03.047

Source: Current Biology - April 16, 2024 Category: Biology Authors: Vincent Castric Rita A Batista Am élie Carré Soraya Mousavi Cl ément Mazoyer C écile Godé Sophie Gallina Chlo é Ponitzki Anthony Theron Arnaud Bellec William Marande Sylvain Santoni Roberto Mariotti Andrea Rubini Sylvain Legrand Sylvain Billiard Xav Source Type: research