[Objective] The aim of the research was to screen Streptomyces hygroscopicus strains highly producing agricultural antibiotics.[Method] A strain of S.hygroscopicus was screened from the soil of Hainan Island.After natural screening and consecutive ultraviolet induced mutation twice,S6-7 strain was obtained as the original strain which was then treated by UV irradiation and streptomycin resistance screening,and finally rescreened through shake-flask fermentation.[Result] 7 better strains were selected by pri...
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