Demogenetic study on ABO blood group distribution and allelic frequency in tribal population of District Kishanganj, Bihar, India

Narendra Srivastava^a* & Ravindra Shrivastava^b
aUniversity Department of Zoology, B.N.Mandal University, Madhepura, Bihar, India
^bDepartment of Zoology, Insan Degree College, Kishanganj, Bihar, India
Received : 28th December, 2020 ; Revised : 29th January, 2021

Abstract : The district Kishanganj is situated in north eastern part of Bihar. It represents 4% tribal population in its total of 16.9 lakhs population. A random stratified sampling was conducted in three administrative blocks to collect blood samples from three major tribe populations namely Santhal, Oraon and Munda. The total tribal population represents phenotypic and genotypic frequencies as B (40.31%)>A(29.61%)>O(18.74%)>AB(11.34%) and I⁰(0.4553)>I^B(0.3094)>I^A(0.2351) respectively. The goodness of fit chi square test represents that Santhals of the area are non-homogeneous in ABO blood group distribution (5 pie² =10.8192, df=1,0.01>p>0.001, significant)whereas Oraon (5 pie²=0.0463, df=1, 0.08>p>0.70, non – significant) and Munda (5 pie²= 0.0131, df = 1, 0.95>p>0.90, non-significant) are homogeneous. The intra-population and inter-population variations are analysed statistically and probable causes are discussed.

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