Transitions from reproductive systems governed by two self-incompatible Loci to one in fungi.

Détails

ID Serval
serval:BIB_1DEE04172684
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Transitions from reproductive systems governed by two self-incompatible Loci to one in fungi.
Périodique
Evolution
Auteur(s)
Vuilleumier Séverine, Alcala Nicolas, Niculita-Hirzel Hélène
ISSN
1558-5646 (Electronic)
ISSN-L
0014-3820
Statut éditorial
Publié
Date de publication
2013
Peer-reviewed
Oui
Volume
67
Numéro
2
Pages
501-516
Langue
anglais
Résumé
Self-incompatibility (SI), a reproductive system broadly present in plants, chordates, fungi, and protists, might be controlled by one or several multiallelic loci. How a transition in the number of SI loci can occur and the consequences of such events for the population's genetics and dynamics have not been studied theoretically. Here, we provide analytical descriptions of two transition mechanisms: linkage of the two SI loci (scenario 1) and the loss of function of one incompatibility gene within a mating type of a population with two SI loci (scenario 2). We show that invasion of populations by the new mating type form depends on whether the fitness of the new type is lowered, and on the allelic diversity of the SI loci and the recombination between the two SI loci in the starting population. Moreover, under scenario 1, it also depends on the frequency of the SI alleles that became linked. We demonstrate that, following invasion, complete transitions in the reproductive system occurs under scenario 2 and is predicted only for small populations under scenario 1. Interestingly, such events are associated with a drastic reduction in mating type number.
Mots-clé
Basidiomycota, bifactorial (tetrapolar) system, frequency-dependent selection, mating-type loci, self-incompatibility, sex, unifactorial (bipolar) system
Pubmed
Web of science
Open Access
Oui
Création de la notice
06/08/2012 13:55
Dernière modification de la notice
08/05/2019 15:26
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