PREPARATION OF YEAST HAVING AGGLUTINATIVE PROPERTY AND FERMENTATIVE PROPERTY

摘要

PURPOSE:To obtain a yeast having excellent agglutinative property and sufficiently high alcoholic fermentation capability, by the protoplast fusion of a specific mutant yeast having excellent agglutinative property with another yeast belonging to Saccharomyces genus and free from agglutinative property. CONSTITUTION:A yeast belonging to Saccharomyces genus and free from agglutinative property (Saccharomyces cerevisiae IFO-0224, etc.) is sporulated, and the obtained spore is subjected to the mutagenic treatment. A mutant yeast having excellent agglutinative property [Saccharomyces cerevisiae RM-17 (FERM-P No.7770)] having excellent agglutinative property is prepared from the mutant spore. The mutant yeast is subjected to the protoplast fusion with another yeast belonging to Saccharomyces genus and free from agglutinative property, and the fused yeast is cultured to obtain a yeast having agglutinative property and fermentation capability [Saccharomyces FRM17VM2-1 (FERM-P No.7792), etc.].