THE DISTRIBUTION OF BACILLUS THURINGIENSIS AND CRY GENE DIVERSITY IN CHINA / 微生物学通报

ABSTRACT

cryⅢ gene,they were found in 75 6%,67 9%,58 4% and14 5% of the strains respectively,no cryⅠ Ⅴ gene was found,10cry gene combination types were concluded.The Bt isolates which contained cryⅠ genes were further characterized by additional PCR detection with specific primers of the cryⅠAc,cryⅠC and cryⅠE genes.20 Bt isolates which contained cryⅠAc,cryⅠC,cryⅡ and cryⅤ genes were found,among them the strain Bt\|15A3 is high toxic to Heliothis armigera,Spodoptera exigua and Plutella xylostella,and has potential developing and applying value.