Fig. 4
a Distributions of ENC binned by species with the bottom, second, third, and top quartiles of global recombination rate, pooled from not significant and significant genes from the 3748 alignments used for COEVOL b The total distributions of ENC for the 3748 COEVOL genes for species from the best represented plant families in this study. c Distributions of 3GCS ordered by recombination rate. d Complementary distribution of 3GCS shows similar patterns of codon bias and GC bias at 3rd position 4-fold degenerate sites in Poaceae vs other plant families best represented in this study