Fig. 5
From: Genome-wide analysis on the maize genome reveals weak selection on synonymous mutations
The observed patterns are robust when we investigate CAI (codon adaptation index) instead of tAI. a The relationship between tAI and CAI. The 18 amino acids (Met and Trp excluded) are plotted separately. A linear regression line is drawn in each panel. b DAF and MAF spectrum of synonymous mutations that increase or decrease the CAI. P values are calculated from Wilcoxon rank sum tests