Mutation breeding of yeast with high pressure technology for whole wheat beer and its application

A mutant strain Gy3 yeast was obtained after treatment with 150MPa high pressure and screening with diacetyl plate.The strain had strong cohesiveness(Sri Lankan values=1.3ml) and is suitable for beer fermentation with wheat malt.Fermentation degree of the strain was 66%~68%,which was below the taste threshold.The strain has good genetic stability.Production test results showed that adaptability of beer yeast strain SP-03 is good in whole wheat malt brewing and the product has pure,cool light and soft taste,which fit well to type of domestic light cool soft beer and consumers taste.Strain SP-03,which has proper physical and productive characteristic,could be used in while wheat beer brewing.