Dominance hierarchy arising from the evolution of a complex small RNA regulatory network
2014
Durand, Eléonore | Méheust, Raphaël | Soucaze, Marion | Goubet, Pauline M. | Gallina, Sophie | Poux, Céline | Fobis-Loisy, Isabelle | Guillon, Eline | Gaude, T. | Sarazin, Alexis | Figeac, Martin | Prat, Elisa | Marande, William | Berges, Helene, H. | Vekemans, Xavier | Billiard, Sylvain | Castric, Vincent | Université de Lille, Sciences et Technologies | Institut National de la Recherche Agronomique (INRA) | Reproduction et développement des plantes (RDP) ; École normale supérieure de Lyon (ENS de Lyon) ; Université de Lyon-Université de Lyon-Institut National de la Recherche Agronomique (INRA)-Université Claude Bernard Lyon 1 (UCBL) ; Université de Lyon-Centre National de la Recherche Scientifique (CNRS) | Dept Biol ; Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich) | Université de Lille, Droit et Santé | Centre National de Ressources Génomiques Végétales (CNRGV) ; Institut National de la Recherche Agronomique (INRA) | ANR Jeunes Chercheurs BRASSIDOM [ANR 11 JSV7-008-01] ; Bonus Qualite Recherche Universite Lille 1 ; Region Nord Pas de Calais (program "projets emergents") [MICRO2] ; CNRS
International audience
Mostrar más [+] Menos [-]Inglés. The prevention of fertilization through self-pollination (or pollination by a close relative) in the Brassicaceae plant family is determined by the genotype of the plant at the self-incompatibility locus (S locus). The many alleles at this locus exhibit a dominance hierarchy that determines which of the two allelic specificities of a heterozygous genotype is expressed at the phenotypic level. Here, we uncover the evolution of how at least 17 small RNA (sRNA)-producing loci and their multiple target sites collectively control the dominance hierarchy among alleles within the gene controlling the pollen S-locus phenotype in a self-incompatible Arabidopsis species. Selection has created a dynamic repertoire of sRNA-target interactions by jointly acting on sRNA genes and their target sites, which has resulted in a complex system of regulation among alleles.
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