Linkage disequilbrium. Linkage disequilibrium |D'| (A) and r2 (B) calculated between Hox5 and Hox10 loci using three SNP markers per locus. Values are only referred to orange blocks. (C) Haplotypes and their population frequency. Letter blocks correspond to the six SNP types. Thin lines connect haplotypes with a frequency > 0.1%; thick lines connect haplotypes with a frequency > 10.0%. The recombination D' value between the two blocks is shown.