Founder genotype frequency variation across the genome in the DSPR RILs. The first eight rows show the frequency of each homozygous founder genotype in the pA (pA1, dark blue; pA2, light blue) and pB (pB1, dark red; pB2, pink) DSPR RILs. The 1/8 line shows the expected frequency for equal founder composition. The bottom row shows the frequency of heterozygous genotypes (note the y-axis scale is considerably reduced for these plots).