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  • Title: The gyrB gene is a useful phylogenetic marker for exploring the diversity of Flavobacterium strains isolated from terrestrial and aquatic habitats in Antarctica.
    Author: Peeters K, Willems A.
    Journal: FEMS Microbiol Lett; 2011 Aug; 321(2):130-40. PubMed ID: 21645050.
    Abstract:
    Within the phylum Bacteroidetes, the gyrB gene, encoding for the B subunit of the DNA gyrase, has been used as a phylogenetic marker for several genera closely related to Flavobacterium. The phylogenies of the complete 16S rRNA gene and the gyrB gene were compared for 33 Antarctic Flavobacterium isolates and 23 type strains from closely related Flavobacterium species. gyrB gene sequences provided a higher discriminatory power to distinguish between different Flavobacterium groups than 16S rRNA gene sequences. The gyrB gene is therefore a promising molecular marker for elucidating the phylogenetic relationships among Flavobacterium species and should be evaluated for all the other type strains of described Flavobacterium species. Combining the phylogeny of both genes, the new Antarctic Flavobacterium strains constitute 15 Flavobacterium groups, including at least 13 potentially new species together with one group of isolates probably belonging to the species Flavobacterium micromati and one group close to Flavobacterium gelidilacus.
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