Distribution of ABO and Rh (D) blood groups among four endogamous groups of Andhra Pradesh.

The ABO and Rh (D) blood groups have been examined in 568 individuals of 4 endogamous groups, viz, Mala, Yerukula, Kapu and Vadagalai Ayangar Brahmin. In the ABO blood group system, all the other groups except for the Yerukula show the general Asiatic trend (O greater than B greater than A). All individuals examined among the Vadagalai Ayangar Brahmins were Rh (D)-positive. Other populations show a low frequency of d allele.