Maps showing the ancestry proportions of Eurasian populations during the early Holocene and the spread of Yamnaya-like ancestry throughout Eurasia.

Note: This study groups Caucasus Hunter-Gatherer ancestry with Iranian Farmer ancestry. However, they were genetically distinct populations. Yamnaya-like Proto-Indo-Europeans did not have Iranian Farmer ancestry.

Source: The formation of human populations in South and Central Asia https://www.science.org/doi/10.1126/science.aat7487