Fig. 3

Spearman’s rank correlation of evolutionary rates (AA/site/MY) between mtOXPHOS genes and A nucOXPHOS, B nucMTRP, E nucCRP, F nucControlSingle, and G nucControl genes based on root-to-tip evolutionary rate. In addition, we also estimated the correlation of evolutionary rates between mtOXPHOS genes and C nucOXPHOS genes not from complex 2 and D genes only from complex 2. Spearman’s correlation coefficient (R) and p values (p) are used to estimate the correlation between evolutionary rates of mtOXPHOS genes and evolutionary rates of nuclear-encoded gene categories based on all four arthropod groups (black), diploid species (red), hymenopterans (bees and ants: green, sawflies and wasps: dark green), and other non-Hymenoptera haplodiploid species (blue). Linear regression represents the general trend of the correlation