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  • Title: Genetic studies on Vysyas of Andhra Pradesh, S. India: A1A2BO, Rh (O) D, transferrin, group specific component, haptoglobin and pseudocholinesterase types.
    Author: Gopalam KB, Rao PR.
    Journal: Acta Anthropogenet; 1981; 5(3):175-80. PubMed ID: 6791669.
    Abstract:
    Vysya population, an endogamous Hindu caste group, was sampled from five distant localities of Andhra Pradesh, S. India and examined for A1A2BO, Rh blood groups, Tf, Hp, Gc, cholinesterase E1 and E2 loci, albumin and ceruloplasmin types. The blood group A has shown an exceptionally low value in these groups and consequently there is a rise in O group frequencies (0.7429 to 0.8144). The incidence of Rh negative individuals is very low (0.1115-0.1571), being absent from one of the groups. Tf DChi is found with a frequency ranging from 0.0043 to 0.0333 with a single fast moving Tf B variant in one of the sub-populations. Hp1 gene frequencies ranged from 0.1271 to 0.2130 and Gc2 from 0.1504 to 0.2773. Silent variants at E1 locus of pseudocholinesterase were present in very high frequencies (0.0115 to 0.1925), the overall frequency being 0.1040. Only a single C+5 was found and dibucaine as well as fluoride resistant variants were rare. No variants were found at the loci of albumin and ceruloplasmin. Differentiation in the distribution of these variants in the five sub-populations of Vysyas reported is evident from these studies.
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