Mutation Breeding of Yeast Strains for Fig Fruit Wine

Abstract

Yeast Z20 which screened from natural fermentation fig fruit wine as the original strain, through the 80s UV treatment and 25s microwave treatment, mutant strain UV-5 were selected. Its produced ethanol 13.6%, and it has fast fermentation speed, high wine production degree and the residual sugar quantity is little. After subculture 9 times, the results showed that the UV-5 strain has good genetic stability. Combined with the sensory evaluation results, the wine which fermentation by the strain UV-5 has high clarity, good flavor and good taste, so that the mutant strain UV-5 suitable for fermentation fig fruit wine as special yeast.