Figure 5

Genotype frequencies of key predictive SNPs in the best model for the classification of samples from ethnically distant populations. Bar charts show the genotype frequencies of the key predictive SNPs in the 500 K-only (first field), Array6.0-only (second field), 500 K + GE (third field), and Array6.0 + GE (fourth field) analyses for classification of samples from “CHB and YRI” (first panel), “CHB and CEU” (second panel), “JPT and YRI” (third panel), “JPT and CEU” (fourth panel), and “YRI and CEU” (fifth panel). Legends for the two scenarios, a single key predictive SNP or two key predictive SNPs, are shown. For the scenario of a single key predictive SNP, the proportion of blue, green, and brown reflects the genotype frequencies of AA, AB and BB of the SNP, respectively. The proportions range from 0 to 1 and sum to 1. For the scenario of two key predictive SNPs, nine colors are used to indicate nine possible genotype combinations for two SNPs. Again, the proportion of colored bars indicates the frequencies of genotype combinations, and the proportions range from 0 to 1 and sum to 1.