Figure 5.

Archaic introgression and deep structure in the Middle East

(A) Relative cross coalescent rate (CCR) against Vindija Neanderthal. Note the y axis range.

(B) Distribution of total length of Neanderthal sequences (Mb) per sample in each population. Horizontal lines depict 25%, 50%, and 75% quantiles. Colors reflect regional grouping.

(C) Neanderthal ancestry f4(Vindija,Chimp;X,Mbuti) is negatively correlated with a deep ancestry f4(Kostenki14,X;Ust'-Ishim,Chimp) in the Middle East. Two clines explain the depletion of Neanderthal Ancestry in Middle Easterners; one formed by Basal Eurasian ancestry and the other is African ancestry. We plot regression lines using East Africans (red) and the ancient Eurasians (blue). We generated standard errors for the slopes using a jackknife by dropping one chromosome. Ancient Eurasian slope m = −0.21 ± 0.002, East African slope m = −0.06 ± 0.0008. Both slopes are always negative.

See also Figure S6.