Screening and Cloning of Partial cry1Ac Gene Fragment from an Indigenous Isolate of Bacillus thuringiensis

PCR is a useful technique for quick and simultaneous screening of Bacillus thuringiensis strains for classification and prediction of insecticidal activities. This experiment has been contacted by screening of cry1Ac gene from new isolates Bt. Two indigenous isolates of Bt were used as a template for screening of cry1Ac genes by mixtures of degenerate primer and specific primer of cry1Ac genes. Two new isolates of Bt, T17, 14r1 showed amplification with its cry1Ac gene. But among these two strains, 14r1 strain was showed variation during their amplification (similar to 925bp). The partial cry1Ac gene fragment amplified from Bt isolates, 14r1 and cloned in E. coli vector. The recombinants clones of cry1Ac gene (similar to 925bp) were also showed variation in their amplification.