Fig. 2.

Demographic models implemented for explaining the genetic variation present in current African (A), European (E), East Asian (Ea), Andamanese (An), Indian (I), Papuan (P) and Australian (Au) populations, in relation with Altai Neanderthal (N) and Denisovan (D) archaic populations. The process of archaic introgression in Asian populations is modelled either by different introgression events from a anatomically modern human ghost population (Xn), b, c, d known archaic populations such as N and D and or e, f, g, h by an unknown archaic extinct (Xe) population. An archaic population (Xd) introgressing to Denisovans is also modelled. Turquoise arrows indicate single pulse events of archaic introgression. All models include recent continuous migrations between African and European, European and East Asian, and Papuan and Australian populations