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          Institute: MPI für Evolutionsbiologie     Collection: Experimental Evolution Research Group     Display Documents



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ID: 610658.0, MPI für Evolutionsbiologie / Experimental Evolution Research Group
Mate choice among yeast gametes can purge deleterious mutations
Authors:Tazzyman, S. J.; Seymour, R. M.; Ponmiankowski, A.; Greig, D.
Language:English
Date of Publication (YYYY-MM-DD):2012
Title of Journal:Journal of Evolutionary Biology
Journal Abbrev.:J. Evol. Biol.
Volume:article in press
Review Status:not specified
Audience:Not Specified
Abstract / Description:Meiosis in Saccharomyces yeast produces four haploid gametes that usually fuse
with each other, an extreme form of self-fertilization among the products of a
single meiosis known as automixis. The gametes signal to each other with sex
pheromone. Better-quality gametes produce stronger signals and are preferred
as mates. We suggest that the function of this signalling system is to enable
mate choice among the four gametes from a single meiosis and so to promote
the clearance of deleterious mutations. To support this claim, we construct a
mathematical model that shows that signalling during automixis (i) improves
the long-term fitness of a yeast colony and (ii) lowers its mutational load. We
also show that the benefit to signalling is greater with larger numbers of
segregating mutations
Free Keywords:Saccharomyces; automixis; gamete choice; intratetrad mating;
mate choice; mate preference; sexual selection
External Publication Status:published
Document Type:Article
Communicated by:Brigitte Lechner
Affiliations:MPI für Evolutionsbiologie/AG Experimentelle Evolution
External Affiliations:CoMPLEX, University College London, London, UK; The Galton Laboratory, Department of Genetics, Environment and Evolution, University College London, London, UK; Department of Mathematics, University College London, London, UK
Identifiers:ISSN:1010-061X (print) [ID-No:1]
ISSN:1420-9101 (online) [ID-No:2]
DOI:10.1111/j.1420-9101.2012.02539.x [ID-No:3]
LOCALID:2923/S 39268 [Listen-Nummer/S-Nummer]
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