The advances of molecular genetics enabled us to understand the molecular basis of the ABO locus. Considering its importance as a genetic marker and its applications, the aim of this study was to verify the distribution of the ABO genotypes in a Brazilian population from the Northwest region of the São Paulo State, Brazil. The genomic DNA was extracted from three hundred and twenty four healthy Brazilian blood donors (O 150; A 118; B 32 and AB 24) and analyzed by PCR amplification followed by restriction enzyme digestion. Fourteen genotypes were identified and the relative frequencies of the O¹, O1v, O², A and B genes were estimated at 44.6%, 16.9%, 4.1%, 25.3% and 9.1%, respectively. These results demonstrate that the ABO locus presents a high polymorphism as revealed by molecular analysis.
ABO genotypes; ABO genes; blood donors
