A study led by the Institute of Paleogenomics and published in Cell has analyzed the DNA of individuals from Bronze Age sites in the Betwa River valley. The research identifies the earliest known genetic markers for resistance to specific waterborne bacterial pathogens in the Indian subcontinent. These adaptations likely developed as a response to the increased population density and the reliance on riverine irrigation systems characteristic of the early urban phase in the region.
The genomic evidence shows a selective sweep occurring around 2500 BCE, indicating a rapid evolutionary response to environmental health challenges. This discovery provides a new perspective on how ancient civilizations were shaped not just by culture and technology, but by the biological pressures of their landscape. The findings also suggest that the inhabitants of the Betwa valley had a sophisticated understanding of hygiene and water management, as reflected in the archaeological layout of their settlements which aligned with these genetic findings.