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Dominance hierarchy arising from the evolution of a complex small RNA regulatory network

Abstract : 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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https://hal.inrae.fr/hal-02639367
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Submitted on : Thursday, May 28, 2020 - 11:54:12 AM
Last modification on : Wednesday, November 10, 2021 - 4:30:10 PM

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Eléonore Durand, Raphaël Méheust, Marion Soucaze, Pauline M. Goubet, Sophie Gallina, et al.. Dominance hierarchy arising from the evolution of a complex small RNA regulatory network. Science, American Association for the Advancement of Science, 2014, 346 (6214), pp.1200-1205. ⟨10.1126/science.1259442⟩. ⟨hal-02639367⟩

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