Figure 2

Phylogenetic trees based on ZOM, FOM and SOM based genomic signatures. The ZOM, FOM and SOM based trees (panels A, B, C, respectively) all show genomes compared using 0^th, 1^st and 2^nd order Markov chain model based genomic signatures and clustered using average linkage with Euclidean distance. It can be seen that there is large agreement between the different Markov chain based genomic signatures. For all models, marine and terrestrial host based species of genus Brucella appear in distinctive groups, except for the SOM based tree (C) where the marine mammal associated strain B. sp. F5/99 is grouped with terrestrial mammal associated species. The more distantly related genera of Agrobacterium and Ochrobactrum appear in separate groups than the species of genus Brucella for all genomic signature based models.