, rs9399137, rs7775698, and 3-bp (TAC) deletion, and SNP rs5006884 in OR51B6 was done by PCR, followed by nucleotide sequencing using the BigDye terminator cycle sequencing kit from Applied BioSystems.HBG1-HBD nucleotide sequencing. Short (500-600 bp) and overlapping fragments of DNA covering the 14.1 kb region were amplified by PCR. All PCR reactions were performed in a total volume of 20 ml. Master mix concentrations, and cycling conditions were optimized based on the region being amplified. Usually, each reaction contained 100-250 ng of DNA, 1X PCR buffer (Applied BioSystems), 2 mM MgCl 2 , 200 mM dNTP, 1 ng of each primer, and 0.5U AmpliTaq polymerase. Cycling conditions consisted of 5 min at 948C, followed by 30 cycles of 40 sec at 948C, 40 sec at 558C, and 3 min at 728C and a 7-min elongation step at 728C.Statistical Analysis. Association between HbF and the minor alleles of each QTL was statistically analyzed by the Fisher exact test performed in R (www.r-project.org). Comparison of hematological parameters and correlation between NOMAP and HbF in both groups was examined using paired T-test. An overall significance level of 0.05 was set for all statistical analyses.