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Four groups of Lohanas, belonging to the Gujarati, Sindhi and Punjabi were studied for various genetic markers. Lohanas have higher B than A and low Rh(D) negative (1.65–4.64%). The Hp¹ gene ranges from 0.1557 to 0.2639; Gm¹ is lower (0.34–0.55) than in other populations in Southern India. G-6-PD deficiency was prevalent in 3–8%. All the four groups have a high incidence of the thalassaemia trait and possess Hb-D. Hb, J, and L were also observed in two groups. Data was analysed for intergroup differences.

Three groups of Saraswat Brahmans in Western India and a group of Goan Catholics ethnologically related to Saraswats were studied for various genetic markers. Saraswats have higher A than B with an Rh(D)-negative incidence ranging from 10 to 17%. All the groups have low incidence of G-6-PD deficiency (up to 1 %). Incidence of thalassaemia trait ranges from 1 to 6%. Gm(l) was present in 85–87%. Intergroup differences suggest genetic closeness between the various groups with genetic distance ranging from 0.8 to 1.5. Genetic relationship between Goan Catholics and Chitrapur Saraswats confirms the ethnological and historical evidence of relationship between the two groups.

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