Fig. 4. Modelling West Eurasian hunter-gatherer individuals (n = 26) as having a single-source or a two-source ancestry with qpAdm, using the lowest rank model.
The ~15,140-year-old Goyet Q2 individual from Belgium and the ~14,060-year-old Villabruna individual from Italy were used as potential sources. Within each geographical area (Central/Western Europe, Iberia and Britain) individuals are ordered on the basis of their chronological age from oldest to youngest. Standard errors (s.e.) were calculated using weighted block jackknife and a block size of 5 Mb. Here, s.e. indicates ±1 s.e.