Indian Caste Origins: Genomic Insights and Future Outlook

(Kshatriya), Brahmin being of a socially higher rank than Kshatriya. The third rank was made up of Vis, that is, all the subjects. To this society, a fourth rank was added: Shudra, who had no rights to Aryan ritual. In southern India, the me- nial workers, the so-called "untouch- ables", were placed in a new varna, Pan- chama (meaning fifth). It is conceivable that the Aryan speakers had greater con- tact, including genetic admixture, with the Brahmins, who were professionally the torchbearers and promoters of Aryan rituals. The Aryan contact should have been progressively less as one descended the varna ladder. The genetic expecta- tion, therefore, is that the proportions of those genes (or genomic features, such as haplotypes or haplogroups) that "characterized" the Aryan speakers should progressively decline from the highest varna to the lowest and a reverse trend should be observed with respect to those genes that "characterized" the in- digenous Indians.