Plots of SNP variant frequency versus chromosomal position and corresponding probability of linkage to the superior or inferior parent. Plots of SNP variant frequency versus chromosomal position in all 16 yeast chromosomes for the selected (raw data: light grey triangles; smoothed data: red line) and unselected pool (raw data: light grey circles; smoothed data: green line). Significant upward deviations from the average of 0.5 indicate linkage to the superior parent 26B, while significant downward deviations indicate linkage to the inferior parent ER7A. The smoothed line was determined as described previously [20, 29]. Linked regions were detected with EXPLoRA (Duitama et al. in preparation).