Fig. 3

Relationship between expression divergence and tissue specificity of SSD-derived grass duplicate genes. a Scatterplot showing correlation between expression divergence (Euclidian distance) and tissue specificity (τ) 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. b Comparisons of observed counts of primary tissues of duplicate genes relative to those expected based on proportions of primary tissues of single-copy genes. Positive values represent overrepresentations, and negative values underrepresentations, relative to expectations. *P < 0.05, **P < 0.001