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Streptomyces Avermitilis was irradiated by 12C6+ ion beams and high avermectin B1a producing strains were screened.The mutation effects of charged particles were studied.After screening of high avermectin B1a producing strains irradiated by 12C6+ ion beams,strains 147 which
Streptomyces Avermitilis was irradiated by 12C6 + ion beams and high avermectin B1a producing strains were screened. The mutation effects of charged particles were studied. After screening of high avermectin B1a producing irradiated by 12C6 + ion beams, strain 147 which