Fig. 1

Blocks found in the linkage disequilibrium (LD) analysis on 32 SNPs. LD is indicated by standard color schemes with bright red (very strong: LOD > 2, D′ = 1), light red (LOD > 2, D′ < 1) and blue (LOD < 2, D′ = 1) for intermediate LD, and white (none: LOD < 2, D′ < 1)