uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Evolution of uni- and bifactorial sexual compatibility systems in fungi
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Evolutionary Biology.
Show others and affiliations
2013 (English)In: Heredity, ISSN 0018-067X, E-ISSN 1365-2540, Vol. 111, no 6, 445-455 p.Article, review/survey (Refereed) Published
Abstract [en]

Mating systems, that is, whether organisms give rise to progeny by selfing, inbreeding or outcrossing, strongly affect important ecological and evolutionary processes. Large variations in mating systems exist in fungi, allowing the study of their origin and consequences. In fungi, sexual incompatibility is determined by molecular recognition mechanisms, controlled by a single mating-type locus in most unifactorial fungi. In Basidiomycete fungi, however, which include rusts, smuts and mushrooms, a system has evolved in which incompatibility is controlled by two unlinked loci. This bifactorial system probably evolved from a unifactorial system. Multiple independent transitions back to a unifactorial system occurred. It is still unclear what force drove evolution and maintenance of these contrasting inheritance patterns that determine mating compatibility. Here, we give an overview of the evolutionary factors that might have driven the evolution of bifactoriality from a unifactorial system and the transitions back to unifactoriality. Bifactoriality most likely evolved for selfing avoidance. Subsequently, multiallelism at mating-type loci evolved through negative frequency-dependent selection by increasing the chance to find a compatible mate. Unifactoriality then evolved back in some species, possibly because either selfing was favoured or for increasing the chance to find a compatible mate in species with few alleles. Owing to the existence of closely related unifactorial and bifactorial species and the increasing knowledge of the genetic systems of the different mechanisms, Basidiomycetes provide an excellent model for studying the different forces that shape breeding systems.

Place, publisher, year, edition, pages
2013. Vol. 111, no 6, 445-455 p.
Keyword [en]
Bipolar, tetrapolar, mating system, sexual compatibility, self-incompatibility
National Category
Natural Sciences
URN: urn:nbn:se:uu:diva-213311DOI: 10.1038/hdy.2013.67ISI: 000327178100001OAI: oai:DiVA.org:uu-213311DiVA: diva2:682158
Available from: 2013-12-23 Created: 2013-12-20 Last updated: 2013-12-23Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Nieuwenhuis, Bart P. S.
By organisation
Evolutionary Biology
In the same journal
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 239 hits
ReferencesLink to record
Permanent link

Direct link