[New remote hybrids between Saccharomyces and Schizosaccharomyces]

Crossing the cells of Saccharomyces (diploid) and Schizosaccharomyces (haploid) cells as well as using genetic markers (adenine dependent mutants) and selective media produced remote hybrids. The hybrid cultures possessed the intermediate type of inheritance in a number of properties. Along with budding typical of Saccharomyces, partitions characteristic of Schizosaccharomyces were encountered. The shape and size of cells and some physiological properties were found to vary in the course of vegetative growth (no spores were formed by the hybrid cultures). Conditions are discussed which favour remote hybridization of yeast cultures.