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BIBTEX RIS

Genetic relationships between sympatric populations of Bacillus cereus and Bacillus thuringiensis, as revealed by rep-PCR genomic fingerprinting

2008; Instituto Oswaldo Cruz, Ministério da Saúde; Volume: 103; Issue: 5 Linguagem: Inglês

10.1590/s0074-02762008000500016

ISSN

1678-8060

Autores

Ana Paula S Peruca, Gislayne Trindade Vilas-Bôas, OMN. Arantes,

Tópico(s)

Insect Resistance and Genetics

Resumo

The bacterial strain Bacillus cereus is closely related to Bacillus thuringiensis, although any genetic relationship between the two strains is still in debate. Using rep-PCR genomic fingerprinting, we established the genetic relationships between Brazilian sympatric populations of B. cereus and B. thuringiensis simultaneously collected from two geographically separate sites. We observed the formation of both B. thuringiensis and B. cereus clusters, as well as strains of B. cereus that are more closely related to B. thuringiensis than to other B. cereus strains. In addition, lower genetic variability was observed among B. thuringiensis clusters compared to B. cereus clusters, indicating that either the two species should be categorized as separate or that B. thuringiensis may represent a clone from a B. cereus background.

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