Abstract: The distribution of ABO blood groups in Dongxiang, Baoan and Yugu nationalities of Gtansu was examined. Dongxiang nationality with high frequency of B (35. 94%) and low frequency of A (32. 42%) was observed. In common with other populations of Han nationality in central China and Tibetan nationality in Tibet, Baoan nationality revealed a high frequency of A (34. 16%) . Yugu nationality appeared to have higher frequency of o (43. 85%) .

Key words: Blood groups; Dongxiang nationality; Baoan nationality; Yugu nationality