Genome-wide linkage analysis of the microsatellite marker data. A, Single-locus linkage results. B, Two-locus genome scan using the general two-locus model MLS. Above the diagonal are genome-wide results on a two-locus MLS scale of 0–6, and below the diagonal are chromosome 6 results on a two-locus MLS scale of 15–18. Highest fine-grid two-locus peaks in the 2D MLS surface, including (C) and excluding (D) chromosome 6.