Figure 3

Principal components (PCA) and structure analysis. PCA performed on all SNP data from all 19 genes considered (A) and for a subset different subsets: bitter (B) and non-synonymous SNPs for bitter (C). Structure analyses with full set of SNPs (D) and non-synonymous SNPs from bitter taste receptors (E). Each individual is represented by one vertical line with the proportion of assignment to each cluster shown on the top and the different colours are referent to different clusters: international (INT) = blue; Asian (ASD and ASWB) = green; and European (IB and EUWB) = red. Breed and population codes are as in Table 1.