This map shows the major ancestral layers that make up South Asian populations 🗺️ Rather than coming from a single source, South Asia is shaped by four deep ancestral components, each distributed differently across the region. 👇 Here’s how to read the map. 🌱 ANCIENT SOUTH INDIAN (AASI) This is the oldest indigenous layer of South Asia. • Highest in southern India and tribal populations • Present across the entire subcontinent AASI ancestry represents the deep local foundation of South Asian g