[Taxonomic identification of Saccharomyces from yeast genetic stock centers of the University of California].

The hybrids between Saccharomyces cerevisiae sensu Naumov et al. 1983, S. bayanus sensu Vaughan Martini et Kurtzman 1985, S. paradoxus sensu Naumov 1986 tester strains and greatly abundant Saccharomyces genetic lines were analyzed. The latters were showed to classify as Saccharomyces cerevisiae species. The intraspecific hybrids are fertile and give normal meiotic segregations of control markers, the interspecific hybrids are characterized by sterility through the unviability of ascosporous posterity.