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Heyrman, J., Logan, N.A., Busse, H.J., Balcaen, A., Lebbe, L., et al. (2003) Virgibacillus carmonensis sp. nov., Virgibacillus necropolis sp. nov. and Virgibacillus picturae sp. nov., three novel species isolated from deteriorated mural paintings, transfer of the species of the genus Salibacillus to Virgibacillus, as Virgibacillus marismortui comb. nov. and Virgibacillus salexigens comb. nov., and emended description of the genus Virgibacillus. International Journal of Systematic and Evolutionary Microbio

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• TITLE: Phylogeny of the Order Bacillales inferred from 3’ 16S rDNA and 5’ 16S-23S ITS nucleotide sequences

  AUTHORS: Sabarimatou Yakoubou, Dong Xu, Jean-Charles Côté

  KEYWORDS: Bacillales; 16S rDNA; 16S-23S ITS; Phylogeny

  JOURNAL NAME: Natural Science, Vol.2 No.9, October 8, 2010

  ABSTRACT: A short 220 bp sequence was used to study the taxonomic organization of the bacterial Order Bacillales. The nucleotide sequences of the 3’ end of the 16S rDNA and the 16S-23S Internal transcribed spacer (ITS) were determined for 32 Bacillales species and strains. The data for 40 additional Bacillales species and strains were retrieved directly from Genbank. Together, these 72 Bacillales species and strains encompassed eight families and 21 genera. The 220 bp se- quence used here covers a conserved 150 bp sequence located at the 3’ end of the 16S rDNA and a conserved 70 bp sequence located at the 5’ end of the 16S-23S ITS. A neighbor-joining phylogenetic tree was inferred from comparative analyses of all 72 nucleotide sequences. Eight major Groups were revealed. Each Group was sub-divided into sub-groups and branches. In general, the neighbor-joining tree presented here is in agreement with the currently accepted phylogeny of the Order Bacillales based on phenotypic and genotypic data. The use of this 220 bp sequence for phylogenetic analyses presents several advantages over the use of the entire 16S rRNA genes or the generation of extensive phenotypic and genotypic data. This 220 bp sequence contains 150 bp at the 3’ end of the 16S rDNA which allows discrimination among distantly related species and 70 bp at the 5’ end of the 16S-23S ITS which, owing to its higher percentage of nucleotide sequence divergence, adds discriminating power among closely related species from same genus and closely related genera from same family. The method is simple, rapid, suited to large screening programs and easily accessible to most laboratories.