Early European Farmer (EEF): apparently this is a hybrid component, the result of mixture between “Basal Eurasians” and a WHG-like population possibly from the Balkans. It’s based on a 7500 year old Linearbandkeramik (LBK) sample from Stuttgart, Germany, but today peaks at just over 80% among Sardinians.
West European Hunter-Gatherer (WHG): this ancestral component is based on an 8,000 year old forager from the Loschbour rock shelter in Luxembourg, who belonged to Y-chromosome haplogroup I2a1b. However, today the WHG component peaks among Estonians and Lithuanians, in the East Baltic region, at almost 50%.
Ancient North Eurasian (ANE): this is the twist in the tale, a component based on a 24,000 year old Upper Paleolithic forager from South Central Siberia, belonging to Y-DNA R*, and known as Mal’ta boy or MA-1. This component was very likely present in Southern Scandinavia since at least the Mesolithic, but only seems to have reached Western Europe after the Neolithic. At some point it also spread into the Americas. In Europe today it peaks among Estonians at just over 18%, and, intriguingly, reaches a similar level among Scots. However, numbers weren’t given in the paper for Finns, Russians and Mordovians, who, according to one of the maps, also carry very high ANE, but their results are confounded by more recent Siberian (ENA) admixture.