Fig. 1

View of the salmonicida species section of the phylogenetic tree with proportional branch lengths. See Additional file 1 for the complete tree for all the aeromonads. Putative chromosome sequences were constructed for all the taxa and were compared based on their phylogenetic positions. The red alignments show identity between direct sequences while the gray ones show between inverted sequences. Only the subspecies of each A. salmonicida strain are indicated on the right. The geographic provenance of each taxon is indicated in brackets. Only bootstrap values below 100 are shown. The gradient from red to blue represents the ability of each taxon to grow at a mesophilic temperature (red) or at a strict psychrophilic one (blue)