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Mitotic recombination and genetic changes in Saccharomyces cerevisiae during wine fermentation

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Mitotic recombination and genetic changes in Saccharomyces cerevisiae during wine fermentation

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dc.contributor.author Puig Todolí, Sergi
dc.contributor.author Querol Simón, Amparo
dc.contributor.author Barrio Esparducer, Eladio
dc.contributor.author Pérez Ortín, José Enrique
dc.date.accessioned 2013-12-02T09:53:56Z
dc.date.available 2013-12-02T09:53:56Z
dc.date.issued 2000
dc.identifier.citation Puig Todolí, Sergi Querol Simón, Amparo Barrio Esparducer, Eladio Pérez Ortín, José Enrique 2000 Mitotic recombination and genetic changes in Saccharomyces cerevisiae during wine fermentation Applied and Environmental Microbiology 66 5 2057 2061
dc.identifier.uri http://hdl.handle.net/10550/31681
dc.description.abstract Natural strains of Saccharomyces cerevisiae are prototrophic homothallic yeasts that sporulate poorly, are often heterozygous, and may be aneuploid. This genomic constitution may confer selective advantages in some environments. Different mechanisms of recombination, such as meiosis or mitotic rearrangement of chromosomes, have been proposed for wine strains. We studied the stability of the URA3 locus of a URA3/ura3 wine yeast in consecutive grape must fermentations. ura3/ura3homozygotes were detected at a rate of 1 × 10−5 to 3 × 10−5 per generation, and mitotic rearrangements for chromosomes VIII and XII appeared after 30 mitotic divisions. We used the karyotype as a meiotic marker and determined that sporulation was not involved in this process. Thus, we propose a hypothesis for the genome changes in wine yeasts during vinification. This putative mechanism involves mitotic recombination between homologous sequences and does not necessarily imply meiosis.
dc.relation.ispartof Applied and Environmental Microbiology, 2000, vol. 66, num. 5, p. 2057-2061
dc.subject Saccharomyces cerevisiae
dc.subject Fermentació
dc.title Mitotic recombination and genetic changes in Saccharomyces cerevisiae during wine fermentation
dc.type journal article es_ES
dc.date.updated 2013-12-02T09:53:57Z
dc.identifier.idgrec 001828
dc.rights.accessRights open access es_ES

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