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Last edited by Marshall Theodore; 02-27-2023 at 09:40 PM.
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More Details about my Bahian & Portuguese ancestry:
Spoiler!
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U dont need trust in a "amateur" calculator like g25 (ik its not used in study bcs u can literally model with anythibg and have a overlap problem, but its good enough for simple models especially with averages models) i have some recents studies and with a profissional calculator:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6436108/
Also a model made by a guy in Anthrogenica, with qpAdm and. . . .0% SSA. . .
https://anthrogenica.com/showthread....-WHG-etc/page4
More Details about my Bahian & Portuguese ancestry:
Spoiler!
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What other study supports 7.1% SSA ancestry anywhere in Iberia? None. Many people don't understand that a study only carries weight if its conclusion can be supported by other studies. Peer-reviewed only means it's acceptable to be published. It doesn't mean the conclusion is accurate.
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You guys are talking about different things i think. What they call African admixture is actually North African not SSA (of course), as labeled "% African admixture" on this figure below. These kind of values are pretty reasonable for NA and consistent with other studies, as well estimates in time of admixtures. Obviously the SSA is contained into the NA, it's not gonna show twice separetly in G25.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3519480/
In the other study, they use f3 stats with AIMs "Ancestry Informative Markers" which are more highly differentiated sets of markers than with traditionally used snps. They tend to show more of SSA, or Asian for that matter. Italy appears more SSA because it's more CHG/Basal shifted which is closer (relatively) to SSA than any other components Europeans recieved. It show more deep relationships than admixture per say. Countries like Greece would probably show even more using this method.
While north Italy there s no notable SSA input, it might be even one of the lowest in Europe but it's still quite CHG like, this is the main reason it generally plots more southern on pca than Iberians. Even Germany and Ireland show a tiny bit of SSA with those markers, compared to Denmark or France. This also doesnt show Oceanian which may or may not be above noise level in certain Euro populations.
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