The caste system has left its mark on Indians’ DNA
|A genetic study has traced the emergence of caste system in India to about |
1,575 years ago during the rule of the Gupta dynasty [Credit: IANS]
Majumder explained that “notable among these was the enforcement of social strictures against marriage between castes, as enshrined in the Dharmasastra”. ”This reveals that some social norms leave imprints on the DNA of people, which can be reconstructed by careful genetic studies,” he said. The researchers said they “systematically explored DNA variation in about 400 unrelated Indians belonging to 20 ethnic groups”. In addition to historical links, the study also highlights the complex ancestries.
“The ancestry of Indian population is not unipolar. Multiple ancestral lineages — four in mainland India — have provided their genetic inputs into the population groups of India,” said Majumder. These four ancestral stocks are: Ancestral North Indians (ANI), Ancestral South Indians (ASI), Austro-Asiatic and Tibeto-Burman (north-east India). ”These differences among groups need to be taken into account in understanding casualties of genetic diseases, responses to drugs and vaccines, etc.,” added Majumder on the possible applications of the findings. The findings were published recently in the Proceedings of the National Academy of Sciences journal.
Source: IANS [February 03, 2016]