Ancient Ecuadorian Genomes Reveal 1,500 Years of Genetic Continuity on Pacific Coast

Newly sequenced ancient genomes from Ecuador's Pacific coast provide the first direct evidence of 1,500 years of genetic continuity in a region long overlooked by ancient DNA research. John Lindo and colleagues analyzed four individuals from the Salango site on Ecuador's central coast, dating to approximately 2,300, 1,900, and 740 years ago. Their findings show that despite major cultural shifts—including the rise of agriculture and later contact with the Inca Empire—the local population remained genetically stable over millennia. This challenges assumptions that population replacement accompanied cultural change in South America. The study, published in a peer-reviewed journal, fills a critical gap in the ancient DNA record for the Pacific coast of South America, where few genomes have been sequenced. It also underscores the value of studying under-sampled regions to understand human history. As ancient DNA methods improve, more such studies from diverse areas are expected to reshape our understanding of pre-Columbian population dynamics.