Median-joining haplotype networks for three candidate early domestication genes, HaGA2ox (A), HaFT1 (B), and c4973 (C). ENA domesticated and ENA wild are the ENA landraces and American and Canadian wild populations, respectively. MX domesticated and MX wild are the Mexican landraces and Mexican wild populations, respectively. The number of substitutions along a branch is shown for branches with more than one substitution.