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Neighbor-joining phylogenetic tree analysis of Bacillus spp. based on gyrA nucleotide sequences (2246 bp) using Pseudomonas spp. as an outgroup. The evolutionary distances were calculated by the p-distance method based on 1000 bootstrap replication. The phylogenetic tree was computed using the MEGA6.0 program. (Molecular Evolutionary Genetics Analysis, a free software obtained from http://www.megasoftware.net/).
