Level plots of alternative allele counts among the three platforms. Scatter plots of alternative allele counts between A) HiSeq and Omni 2.5-8, B) HiSeq and Proton, and C) Proton and Omni 2.5-8 are indicated. The vertical and horizontal axes show the numbers of alternative allele calls for each platform. The color bar indicates the number of SNPs in a pixel. There were 12 individual samples, so the maximum number of alternative alleles is 24. The digits with arrows near the corner indicate the numbers of SNPs at the corner pixels.