Interaction between AB0 and haptoglobin in a white Australian population.

Blood samples from over 2,200 blood donors resident in the State of Victoria were investigated for the association between the AB0 and haptoglobin (HP) blood systems reported by others. No association between the phenotypes of the 2 systems was found but the distribution of the HP*1 allele varied among AB0 groups, and the difference between those who were group 0 and the other AB0 groups combined was significantly (p less than 0.05). Overall, the findings were similar, but not as pronounced, as those reported in the Hutterites.