Fig. 4

Inversion-based phylogeny. Labels beside the branches represent the inversions occurred in the strains (Additional file 8: Table S4). Strains names are colored representing the geographical location (same as Fig. 2). Strains name in black color show the strains with no geographical information. Legend on the right side indicate the reversals shared among multiple strains. * ignoring single gene transposition, ** ignoring single gene transposition and 2 gene inverse transposition, *** ignoring single gene transposition, 2 gene inverse transposition and 3 gene deletion