| Tamil Castes | Andhra Castes | South Indians |
---|---|---|---|
 | (4 castes) | (3 castes) | (2 states, 7 castes) |
Y-chromosome | Â | Â | Â |
   Among states | - | - | -1.88a |
   Among castes | 4.45 | 5.52 | 5.06 |
   Within castes | 95.55 | 94.48 | 96.82 |
Autosomal STRs | Â | Â | Â |
   Among states | - | - | 0.12a, b |
   Among castes | 0.96 | 0.77 | 0.85 |
   Within castes | 99.04 | 99.23 | 99.02 |
mtDNA | Â | Â | Â |
   Among states | - | - | -0.47a |
   Among castes | 4.50 | 0.17a | 2.41 |
   Within castes | 95.50 | 99.83 | 98.06 |