Poonam Kumari & H. N. Tiwari
Department of Zoology, Ranchi College, Ranchi – 834001, Jharkhand, India
Received 7th May, 2010; Revised 13th August, 2010
Abstract : Distribution of ABO blood groups was studied in 798 Oraon and 395 Chero tribes of Palamau Commissionary in Jharkhand. It was observed that phenotype B predominated in distribution with highest frequency (31.57%), followed by O (28.07%) and then closely A (27.19%) in Oraons. In the Chero tribe phenotype O predominated in distribution with highest frequency (34.43%), followed by B (28.35%) and then closely A (26.58%). In both the tribes phenotype AB was seen in least number of cases. A very low frequency of Rhesus-negative phenotype was recorded in the two tribal populations, Oraon (0.5%) and Chero (0.25%). Thus the two tribal groups Oraon and Chero of Palamau Commissionary appear far apart in their genetic make up of the ABO blood group system.