FENOTIPO KILLER: DISTRIBUCIÓN EN LA COMARCA DE LA RIBEIRA SACRA EN LAS POBLACIONES DE Saccharomyces cerevisiae KILLER PHENOTYPE: DISTRIBUTION OF Saccharomyces cerevisiae POPULATION IN RIBEIRA SACRA COUNTY FENOTIPO KILLER: DISTRIBUCIÓN NA COMARCA DA RIBEIRA SACRA NAS POBLACIÓNS DE Saccharomyces cerev

Abstract Resumen Resumo A phenotypic characterization of the killer activity in 404 strains of Saccharomyces cerevisiae species was carried out, 358 strains were isolated from the county of A Ribeira Sacra Ourensana and 46 strains from O Ribeiro (Both in Ourense, Spain). The percentage of strains with killer activity was 8% in A Ribeira Sacra Ourensana and 26% in O Ribeiro. The distribution of the S. cerevisiae strains with killer phenotypes differed significantly (p<0.001) between these two regions, and a relative heterogeneity was also found in the killer phenotype of the strains isolated in the different warehouses of the county A Ribeira Sacra Ourensana. This behaviour was related to the topographic and/or ecological barriers between vineyards, that would hinder an eventful dispersion of the yeast strains. Se llevo a cabo una caracterizacion fenotipica de la actividad killer de 404 cepas de la especie Saccharomyces cerevisiae, 358 cepas aisladas en la comarca vitivinicola de A Ribeira Sacra Ourensana ...