Multiple convergent supergene evolution events in mating-type chromosomes - Archive ouverte HAL Access content directly
Journal Articles Nature Communications Year : 2018

Multiple convergent supergene evolution events in mating-type chromosomes

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 cose-gregating supergenes. We find independent evolutionary strata (stepwise recombination suppression) in several species, with extensive rearrangements, gene losses, and transpo-sable 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.
Fichier principal
Vignette du fichier
Branco 2018 Nat Com.pdf (1.39 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive
Loading...

Dates and versions

hal-01796609 , version 1 (21-05-2018)

Identifiers

Cite

Sara E Branco, Fantin E Carpentier, Ricardo Rodriguez de La Vega, Hélène Badouin, Alodie Snirc, et al.. Multiple convergent supergene evolution events in mating-type chromosomes. Nature Communications, 2018, 9 (1), pp.2000. ⟨10.1038/s41467-018-04380-9⟩. ⟨hal-01796609⟩
247 View
65 Download

Altmetric

Share

Gmail Facebook X LinkedIn More