title: Combined use of killer biotype and mtDNA-RFLP patterns in a Patagonian wine Saccharomyces cerevisiae diversity study.
abstract: The aim of this work was to characterize the indigenous wine Saccharomyces cerevisiae diversity within the Argentinean Patagonia. Two cellars with particular enological practices located in different winegrowing areas were selected and 112 indigenous S. cerevisiae isolates were obtained from spontaneous red wine fermentations carried out in them. Thirty-five and 19 patterns were distinguished among the total indigenous isolates using mtDNA-RFLP and killer biotype analysis, respectively. The combination of both typing techniques rendered a higher variability with 42 different patterns, i.e. 42 strains, evidencing a great diversity in S. cerevisiae populations associated with spontaneous red wine fermentations in Northwestern Patagonia. The analysis of the relatedness among strains using Principal Coordinates Analysis from combined data allowed the clustering of the strains into two populations significantly related to their origin fermentations. The combined use of the mtDNA-RFLP analysis together with the killer biotype method proved to be a powerful tool in the fingerprinting of the enological S. cerevisiae strains.
authors.affiliation: Departamento de Química, Laboratorio de Microbiología y Biotecnología, Facultad de Ingeniería, Universidad Nacional del Comahue, Buenos Aires 1400, (8300) Neuquén, Argentina.
authors.forename: Christian A
authors.initials: CA
authors.lastname: Lopes
authors.forename: Teresa L
authors.initials: TL
authors.lastname: Lavalle
authors.forename: Amparo
authors.initials: A
authors.lastname: Querol
authors.forename: Adriana C
authors.initials: AC
authors.lastname: Caballero
mesh_terms: D001118:Argentina; D016172:DNA Fingerprinting; D004271:DNA, Fungal / Q000235:genetics; D004272:DNA, Mitochondrial / Q000235:genetics; D017753:Ecosystem; D005285:Fermentation; D014644:Genetic Variation; D055646:Killer Factors, Yeast; D010641:Phenotype; D012150:Polymorphism, Restriction Fragment Length; D011506:Proteins / Q000145:classification; D012441:Saccharomyces cerevisiae / Q000145:classification* / Q000235:genetics* / Q000302:isolation & purification; D029701:Saccharomyces cerevisiae Proteins / Q000145:classification; D014920:Wine / Q000382:microbiology*
chemical_list: D004271:DNA, Fungal; D004272:DNA, Mitochondrial; D055646:Killer Factors, Yeast; D011506:Proteins; D029701:Saccharomyces cerevisiae Proteins