Multiple convergent supergene evolution events in mating-type chromosomes

Sara Branco, Fantin Carpentier, Ricardo C. Rodríguez de la Vega, Hélène Badouin, Alodie Snirc, Stéphanie Le Prieur, Marco A. Coelho, Damien M. de Vienne, Fanny E. Hartmann, Dominik Begerow, Michael E. Hood and Tatiana Giraud ()
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Sara Branco: Ecologie Systématique Evolution, Bâtiment 360, Univ. Paris-Sud, AgroParisTech, CNRS, Université Paris-Saclay
Fantin Carpentier: Ecologie Systématique Evolution, Bâtiment 360, Univ. Paris-Sud, AgroParisTech, CNRS, Université Paris-Saclay
Ricardo C. Rodríguez de la Vega: Ecologie Systématique Evolution, Bâtiment 360, Univ. Paris-Sud, AgroParisTech, CNRS, Université Paris-Saclay
Hélène Badouin: Ecologie Systématique Evolution, Bâtiment 360, Univ. Paris-Sud, AgroParisTech, CNRS, Université Paris-Saclay
Alodie Snirc: Ecologie Systématique Evolution, Bâtiment 360, Univ. Paris-Sud, AgroParisTech, CNRS, Université Paris-Saclay
Stéphanie Le Prieur: Ecologie Systématique Evolution, Bâtiment 360, Univ. Paris-Sud, AgroParisTech, CNRS, Université Paris-Saclay
Marco A. Coelho: Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa
Damien M. de Vienne: Univ Lyon, Université Lyon 1, CNRS, Laboratoire de Biométrie et Biologie Evolutive UMR5558
Fanny E. Hartmann: Ecologie Systématique Evolution, Bâtiment 360, Univ. Paris-Sud, AgroParisTech, CNRS, Université Paris-Saclay
Dominik Begerow: Ruhr-Universitat Bochum, AG Geobotanik Gebaude ND 03/174 Universitatsstraße
Michael E. Hood: University of Virginia
Tatiana Giraud: Ecologie Systématique Evolution, Bâtiment 360, Univ. Paris-Sud, AgroParisTech, CNRS, Université Paris-Saclay

Nature Communications, 2018, vol. 9, issue 1, 1-13

Abstract: Abstract Convergent adaptation provides unique insights into the predictability of evolution and ultimately into processes of biological diversification. Supergenes (beneficial gene linkage) are striking examples of adaptation, but little is known about their prevalence or evolution. A recent study on anther-smut fungi documented supergene formation by rearrangements linking two key mating-type loci, controlling pre- and post-mating compatibility. Here further high-quality genome assemblies reveal four additional independent cases of chromosomal rearrangements leading to regions of suppressed recombination linking these mating-type loci in closely related species. Such convergent transitions in genomic architecture of mating-type determination indicate strong selection favoring linkage of mating-type loci into cosegregating supergenes. We find independent evolutionary strata (stepwise recombination suppression) in several species, with extensive rearrangements, gene losses, and transposable element accumulation. We thus show remarkable convergence in mating-type chromosome evolution, recurrent supergene formation, and repeated evolution of similar phenotypes through different genomic changes.

Date: 2018
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DOI: 10.1038/s41467-018-04380-9

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