Fig. 2
From: Rapid functional divergence after small-scale gene duplication in grasses
Relationship between expression and protein-coding sequence divergence rates of SSD-derived grass duplicate genes. Scatterplots showing correlations between expression divergence (Euclidian distance) and (a) nonsynonymous sequence divergence (Ka), (b) synonymous sequence divergence (Ks), and (c) nonsynonymous/synonymous sequence divergence (Ka/Ks) rates of SSD-derived duplicate genes in B. distachyon (left), O. sativa japonica (middle), and S. bicolor (right). The best-fit linear regression line is shown in red, and Pearson’s correlation coefficient (r) is provided at the bottom right, for each panel. *P < 0.05, **P < 0.01, ***P < 0.001