UV Breeding by Induced Mutation of Mucor Protease Strain from Sufu

Objective:Breeding of Mucor protease strain with high enzyme activity and good high-temperaturre for fermentation experiments or production of sufu.Method: Mucor protease strains were picked out from sufu,its original strain was induced mutation by UV and fostered by temperature control,breeding of excellent mutant strain.Result:One high enzyme vitality and excellent high-temperature mutant strain named SCLG-mucor 16 was selected,the strain can strongly grow at 32℃.Its HE is 1.39,protease vitality is 180.375u/g,which was enhanced by 7.8% and 51.4% more than the original strain respectively.Conclusion: The excellent mutant strain was used for fermentation experiments or production of sufu, it has a certain using value in shortening the fermentation time,enhancing the quality of sufu and extending the season of production.