Figure 4From: Evolutionary, structural and functional relationships revealed by comparative analysis of syntenic genes in RhizobialesCodon richness index (CRI) for rhizobial genomes. All gene classifications were based on comparisons against S. meliloti, unless explicitly stated otherwise. Panels: (a), S. meliloti (compared with A. tumefaciens). (b), A. tumefaciens. (c), M. loti. (d), B. melitensis. CRIs were calculated according to the method described by Medrano-Soto et al. [27]. Symbols: red circles, syntenic genes. Blue plus signs, non-syntenic. Green squares, homologs in plasmids. Gray crosses, species-specific genes. Horizontal lines denote the species-specific thresholds for low and high CRI.Back to article page