Western Steppe Herder in the context of "Caucasus Hunter-Gatherer"

The Tarim mummies are a series of mummies discovered in the Tarim Basin in present-day Xinjiang, China, which date from 1800 BCE to the first centuries BCE, with a new group of individuals recently dated to between c. 2100 and 1700 BCE. The Tarim population to which the earliest mummies belonged was agropastoral, and they lived c. 2000 BCE in what was formerly a freshwater environment, which has now become desertified.

Zhang et al. (2021) found that these early mummies (dating from 2,135 to 1,623 BCE) had high levels of Ancient North Eurasian ancestry (ANE, about 72%), with smaller admixture from Ancient Northeast Asians (ANA, about 28%), but no detectable Western Steppe-related ancestry. They formed a genetically isolated local population that "adopted neighbouring pastoralist and agriculturalist practices, which allowed them to settle and thrive along the shifting riverine oases of the Taklamakan Desert." These mummified individuals were long suspected to have been "Proto-Tocharian-speaking pastoralists", related to the Afanasievo or BMAC cultures, but "the earliest Tarim Basin cultures appear to have arisen from a genetically isolated local population." Zhang et al. (2025) investigated a Late Bronze Age site in the far west of the Tarim Basin, dated 1600 to 1400 BC. Its inhabitants overwhelmingly descended from the Sintashta and Andronovo population, with additional ancestry from BMAC (10%) and Tarim_EMBA (12%). Nearly all subjects belonged to Y-DNA haplogroup R-M17.