Diagrams of differences in evolutionary rates of "K", the number of nucleotide substitutions per site, of 75 protein-coding genes. Panels A, B, and C represent the variances in relative rates between Medicago and Lotus using the reference plastomes, respectively, as Phaseolus, Glycine, and Arabidopsis. Panels D, E, and F show those between Phaseolus and Glycine using the reference plastomes, respectively, as Medicago, Lotus, and Arabidopsis. The height of the black bar denotes the value of variances (the first bar showed the value, as a scale of this panel). The bars above the axis mean Medicago with higher substitution rates than Lotus in Panels A, B, and C or Phaseolus with higher substitution rates than Glycine in Panels D, E, and F and the bars below the axis represent the opposite case. The asterisk is a sign of significant difference (P < 0.05).
Guo et al. BMC Genomics 2007 8:228 doi:10.1186/1471-2164-8-228