Isolation and Sake-Brewing Characteristics of Mating Mutants of Strain GY115-a3 with High Fermentation and Ginjo-ka Production Abilities

Abstract

　In this study, we aimed to breed strain GY115-a3 by mating with strain Ce41, which is a high ethyl caproate-producing mutant strain derived from Gifu prefecture yeast, strain G. Among the obtained mating mutant strains between strain GY115-a3 and strain Ce41, the tetraploid strains showed the production characteristics for the unique organic acid composition like strain GY115-a3, and also had high fermentation and ginjo-ka production abilities, similar to those of strain Ce41. From these results, it was concluded that the expected mating mutant strains, such as a3×Ce41_1 and a3×Ce41_5, which inherited characteristic properties from the both parent strains, could be bred.