Fig. 1.

Maximum likelihood phylogeny of the aprX gene based on 1,296 positions in the multiple sequence alignment of 61 distinct Pseudomonas strains. Molecular evolution was inferred by the GTR+G+I model, and the tree was outgroup-rooted (P. aeruginosa WS 5022). Branches with high bootstrap support (≥ 70% of 500 replicates) are marked with blue circles. Target strains of the species-specific probes are highlighted in blue (P1), orange (P2), brown (P3), green (P4), and red (P5). Strains were assigned to 13 monophyletic groups, whose names are listed in bold to the right of the tree