Artículos de revistas
Diversity of cry genes and genetic characterization of Bacillus thuringiensis isolated from Brazil
Date
2004-08-01Registration in:
Canadian Journal of Microbiology, v. 50, n. 8, p. 605-613, 2004.
0008-4166
10.1139/w04-052
WOS:000224734600007
2-s2.0-8644273112
7179273060624761
Author
Universidade Estadual Paulista (Unesp)
Institutions
Abstract
Two hundred and eighteen Bacillus thuringiensis isolates from Brazil were characterized by the presence of crystal protein genes by PCR with primers specific to different cry and cyt genes. Among these isolates, 95 were selected according to their geographic origin for genetic characterization with the 16S rRNA gene, RAPD, and plasmid profile. Isolates containing cryl genes were the most abundant (48%) followed by the cry11 and cyt (7%) and cry8 genes (2%). Finally, 40.3% of the isolates did not produce any PCR product. The plasmid profile and RAPD analysis showed a remarkable diversity among the isolates of B. thuringiensis not observed in the 16S rRNA gene. These results suggest that the genetic diversity of B. thuringiensis species results from the influence of different ecological factors and spatial separation between strains generated by the conquest of different habitats.
Subjects
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