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On the basis of genetic analysis, molecular karyotyping and sequence analyses of the 18S rRNA and internal transcribed spacer (ITS) region, three new Saccharomyces species are described, Saccharomyces cariocanus (with type strain NCYC 2890T), Saccharomyces kudriavzevii (with type strain NCYC 2889T) and Saccharomyces mikatae (with type strain NCYC 2888T).… (More)
Allozyme electrophoresis was used to characterize 39 isolates belonging to the wild yeast species Saccharomyces paradoxus for variation at nine enzyme loci. The data revealed significant genetic differentiation between isolates from two geographically distinct regions, one including continental Europe and the other including the Russian Far East and Japan.… (More)
Genetic hybridization and karyotypic analyses revealed the biological species Saccharomyces paradoxus and Saccharomyces cerevisiae in exudates from North American oaks for the first time. In addition, two strains collected from elm flux and from Drosophila by Phaff in 1961 and 1952 were reidentified as S. paradoxus. Each strain studied showed a unique… (More)
Using genetic hybridisation analysis and molecular karyotyping we revealed an association of Saccharomyces bayanus var. uvarum species with Tokaj wine-making. Along with identification of Saccharomyces strains isolated by E. Minárik in Slovakia, the composition of Tokaj populations in Hungary was studied. Twenty-eight Hungarian Saccharomyces strains were… (More)
In Saccharomyces cerevisiae, the gene functions required to ferment the disaccharide maltose are encoded by the MAL loci. Any one of five highly sequence homologous MAL loci identified in various S. cerevisiae strains (called MAL1, 2, 3, 4 and 6) is sufficient to ferment maltose. Each is a complex of three genes encoding maltose permease, maltase and a… (More)
Using genetic and flow cytometric analyses, we showed that wine strain S6U is an allotetraploid of S. cerevisiae x S. bayanus. Hybrid constitution of the strain and its meiotic segregants was confirmed by Southern hybridization analysis of their chromosomal DNAs using four S. cerevisiae cloned genes: LYS2 (chr. II), TRK1 (chr. X), ARG4 (chr. VIII), ACT1… (More)
A divergent population of Saccharomyces cerevisiae has been identified in Malaysia by molecular and genetic analysis. It has also demonstrated that the yeast S. bayanus may be found in South America. Problems of the origin of S. cerevisiae are discussed.
Genetic and karyotypic studies of someSaccharomyces sensu stricto yeasts from Brazil revealed a genetically isolated population which apparently represents a new sibling species ofS. cerevisiae.
We used microsatellite fingerprinting and RAPD analysis to characterize 28 wild European strains of Saccharomyces paradoxus. In contrast to our results from a previous allozyme survey [Naumov et al. Int. J. Syst. Bacteriol. 47: 341-344 (1997a)], these methods revealed extensive genetic variation. The RAPD primers 5'AATCGGGCTG and 5'GGGTAACGCC and the… (More)
Chromosomal DNAs of many monosporic strains of the biological species Saccharomyces cerevisiae, S. paradoxus and S. bayanus were analysed using contour-clamped homogeneous electric field electrophoresis. Southern blot hybridization with eight cloned S. cerevisiae genes (ADC1, CUP1, GAL4, LEU2, rDNA, SUC2, TRP1 and URA3) assigned to different chromosomes was… (More)