Evidence for directional selection. Manhattan plot of SNP association with seed system stage based on mean Bayes factor from 10 replicate runs of BAYENV . The SNPs are plotted according to chromosome and position at chromosome along the Xaxis. Chromosomes 1–10 alter between black and red color. The red dotted line at 3 indicates a positive Bayes factor according to Kass and Raftery (1995) .