Abstract
Several migratory waves from various origins along with cultural practices restricting marriages between people of different castes and tribes as well as continued endogamy have led to a complex and diverse society in the Indian subcontinent. Despite being widely represented in genetic studies, several interrogatives remain with regards to India’s current genetic constituents and distributions, source populations and population relationships. To identify the forces that may have shaped Indian population’s genetic relationships, we undertook a comprehensive comparative study of the Y-chromosomes across India utilizing Y-STR and Y-SNP chromosomal markers using the general population of Chennai in the state of Tamil Nadu as a point of reference. Our analyses identify differences in source populations for different regions within India, unique linguistic characteristics as well as demographic and cultural forces that may have shaped population structure.
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