Figure 4.

Nucleotide Diversity of Auxin Signaling Genes.

Nucleotide diversity (π) was determined for all sites (A), synonymous sites (B), and nonsynonymous sites (C) by comparing ~1-kb fragments in 19 accessions. Results were summarized for control genes (n = 236) as well as for the three gene families of receptors (n = 4), Aux/IAAs (n = 29), and ARFs (n = 16) separately and combined (total, n = 49). Error bars denote se. Summary statistics for individual genes are presented in Supplemental Data Set 1 online.