Admixture mapping can be used to identify genomic regions contributing to ethnic differences in vitamin D, iPTH, and BMD.
Novel loci linked to 1,25-dihydroxyvitamin D were identified on 13q21.2 (LOD = 3.20) and 12q13.2 (LOD = 3.10).
iPTH was significantly linked to 9q31.3 (rs7854368, LOD = 3.14) proximal to a regulatory protein of sodium-phosphate cotransport (AKAP).
Fine-mapping of admixture peaks has focused efforts to identify loci with ethnic differences in vitamin D-related traits.