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Genetic affinity between diverse ethnoreligious communities of Tamil Nadu, India: a microsatellite study
M Eaaswarkhanth1, T S Vasulu, Ikramul Haque
1National DNA Analysis Center, Directorate of Forensic Science, Central Forensic Science Laboratory, 30 Gorachand Road, Kolkata 700 014, India.
Abstract:
Historically, a number of local Hindu caste groups have converted to Islam and formed religious endogamous groups. Therefore the local caste groups and religious communities in a region are expected to show genetic relatedness. In this study we investigate the genetic relationship between Tamil-speaking (Dravidian language) Muslims (Sunni), six endogamous Hindu castes, and a tribal ethnic group (Irulars) using 13 CODIS (Combined DNA Index System) autosomal microsatellite markers. Muslims show the highest average heterozygosity (0.405) compared to the other groups. The neighbor-joining tree and the multidimensional-scaling plot show clustering of Tamil-speaking Muslims with three caste groups (Gounder, Paraiyar, and Vanniyar), whereas the Irular tribe is separated out of the cluster.
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