Sub-Saharan Africans are 1/3 Eurasian

[Token]

It seems i missed this paper. Summary of the conclusions:

• It looks like there was a large back-migration event in the Late Middle Paleolithic which replaced a large part of the population of Sub-Saharan Africa.
• No evidence for bidirectional geneflow after the out-of-Africa event.
• The Eurasian back-migration seems to predate admixture events with archaic hominids - no evidence of Neanderthal and Denisovan in modern-day Africans.
• The estimates were 0.35±0.04 for Niger-Kordofanians, and 0.41±0.03 for Nilo-Saharans when using modern-day Eurasians as reference. The authors tells us that these figures may be even higher given that the Neanderthal admixture in the references used may deflate the real percentages.
• South African hunter-gatherers such as the Khoe-san got substantially less Eurasian admixture, more or less half the amount of admixture seen in Yoruba and Nilo-Saharans.
• Mbuti-Biaka are intermediate between Khoe-san and West Africans in terms of Eurasian admixture.

https://www.biorxiv.org/content/10.1...555v1.full.pdf
Abstract: Genetic diversity across human populations has been shaped by demographic history, making it possible
to infer past demographic events from extant genomes. However, demographic inference in the ancient
past is dicult, particularly around the out-of-Africa event in the Late Middle Paleolithic, a period of
profound importance to our species’ history. Here we present SMCSMC, a Bayesian method for inference of
time-varying population sizes and directional migration rates under the coalescent-with-recombination
model, to study ancient demographic events. We find evidence for substantial migration from the
ancestors of present-day Eurasians into African groups between 40 and 70 thousand years ago, predating
the divergence of Eastern and Western Eurasian lineages. This event accounts for previously unexplained
genetic diversity in African populations, and supports the existence of novel population substructure
in the Late Middle Paleolithic. Our results indicate that our species’ demographic history around the
out-of-Africa event is more complex than previously appreciated.

[Dr_Maul]

Related to Haplo E I wonder?

[Chaos One]

[Chaos One]

Related to Haplo E I wonder?

Or maybe those R1b in West Africa can explain this? Hausas are almost 50% R1b.

[Token]

Or maybe those R1b in West Africa can explain this? Hausas are almost 50% R1b.

The R1b came from later Neolithic migrations, that is already established. The Hausa have excess Eurasian when compared to Yoruba.

[Leto]

We find evidence for substantial migration from the ancestors of present-day Eurasians into African groups between 40 and 70 thousand years ago, predating the divergence of Eastern and Western Eurasian lineages.

So that doesn't mean West African blacks are 1/3 Caucasoid or anything like that. Still totally black.

[Token]

So that doesn't mean West African blacks are 1/3 Caucasoid or anything like that. Still totally black.

It was probably something like Basal Eurasian i.e the non Villabruna-like admixture in West Eurasians which peaks in Bedouins. I'd bet it comes from a lineage that stayed in southern Arabia after the out-of-Africa event and then migrated back to the continent instead of going north with the would-be West and East Eurasians.

[Hajimurad]

It was probably something like Basal Eurasian i.e the non Villabruna-like admixture in West Eurasians which peaks in Bedouins. I'd bet it comes from a lineage that stayed in southern Arabia after the out-of-Africa event and then migrated back to the continent instead of going north with the would-be West and East Eurasians.

So, those Eurasians were like Veddoid tribes of South Arabia who speak South Arabian languages (Soqotri, Mahra, etc.)?

[Token]

So, those Eurasians were like Veddoid tribes of South Arabia who speak South Arabian languages (Soqotri, Mahra, etc.)?

Mehri are regular Arabians and West Eurasians, see here. Soqotrians are probably no different given their paternal lineages.

[Hajimurad]

Mehri are regular Arabians and West Eurasians, see here. Soqotrians are probably no different given their paternal lineages.

Then which modern population is closer to these Eurasians?