Fig. 3

Phylogeny of Xanthomonas strains and tal genes. Strains or tal genes from the X. citri pv. fuscans genetic lineages fuscans, NF2 and NF3 are indicated in red, X. phaseoli pv. phaseoli NF1 lineage in blue, X. citri pv. aurantifolii in pink and X. phaseoli pv. manihotis in purple. Ks values corresponding to the divergence of tal genes are indicated in the different trees using the same colours. a Phylogenetic tree representing the evolution of Xanthomonas strains constructed using CVtree on the whole proteome of strains. Numbers at node correspond to mean Ks values calculated on seven housekeeping genes. Vertical dotted lines represent time of tal gene divergence estimated by Ks values written above. The most parsimonious course of events for the evolution of tal genes is highlighted according to the legend. NA: Not applicable. b ML tree constructed on the nucleotide sequences of N-ter-encoding region of tal genes. c ML tree constructed on the nucleotide sequences of C-ter-encoding region of tal genes. For (b) and (c), bootstrap values greater than 50% are shown for 1000 replicates and horizontal scale bars represent number of nucleotide substitutions per site