Latin American genetic studies [official archive]

[BirdMan]

Another Cuban study

https://www.ncbi.nlm.nih.gov/pubmed/19381988

RESULTS:
The results demonstrate a high level of European and African admixture in Mulattos (57-59% European; 41-43% West African). The European contribution was higher in those of Spanish descent (85%) while in those of African descent, the West African contribution ranged between 74% and 76%. Genetic structure was only detected in Mulattos and those of African descent. An Amerindian contribution was not detectable in the studied sample.

Interesting!

When all of the studies reach the same conclusion and when that conclusion is consistent with historical evidence, I'm strongly inclined to believe them.

[Argentano]

Interesting!

When all of the studies reach the same conclusion and when that conclusion is consistent with historical evidence, I'm strongly inclined to believe them.

I have noticed that many cuban and brazilian studies have whites 85% euro Pardos 60% euro and blacks 40% euro. Smething around that.

that would make Cuba 70-74% euro and Brazil 68-72% euro.

What could be making them look less euro is that pardos scoring 60% euro probably look VERY SSA. As Curupira told me once the biggest difference is that somebody scoring 40% african looks black and somebody scoring 40% amerindian can in some cases look very european.

[BirdMan]

I have noticed that many cuban and brazilian studies have whites 85% euro Pardos 60% euro and blacks 40% euro. Smething around that.

that would make Cuba 70-74% euro and Brazil 68-72% euro.

I agree with those numbers for both Cuba and Brazil. They seem consistent with both history and the various studies I have seen.

In any event, I think that it is pretty clear that Cuba still has a high proportion of highly Euro people.

What could be making them look less euro is that pardos scoring 60% euro probably look VERY SSA. As Curupira told me once the biggest difference is that somebody scoring 40% african looks black and somebody scoring 40% amerindian can in some cases look very european.

That's very true. That's one other reason why I prefer genetic studies to anecdotes - they can far more accurately detect someone's ancestry than a guess from any individual person.

[Argentano]

I agree with those numbers for both Cuba and Brazil. They seem consistent with both history and the various studies I have seen.

In any event, I think that it is pretty clear that Cuba still has a high proportion of highly Euro people.



That's very true. That's one other reason why I prefer genetic studies to anecdotes - they can far more accurately detect someone's ancestry than a guess from any individual person.

since you share 23andme with a lot of ricans, make a pic with them ordered according to SSA ancestry. I think that on average they will start to look "black" after 20% SSA

[Argentano]

http://slideplayer.com/slide/6614681/

[Dominicanese]

i say cuba is 63% Euro, 29% Afro, 8% Native, not what the study says

according to my experience having been to cuba 3 times

[Sikeliot]

since you share 23andme with a lot of ricans, make a pic with them ordered according to SSA ancestry. I think that on average they will start to look "black" after 20% SSA

A lot of the Puerto Ricans posted in the individual results thread looked significantly African even with SSA only 15-25%. Two of the women in that range even looked within the range of what we call "black".

[BirdMan]

since you share 23andme with a lot of ricans, make a pic with them ordered according to SSA ancestry. I think that on average they will start to look "black" after 20% SSA

Here are all of the Puerto Ricans I share with over 15% SSA. Unfortunately, I'm not sharing with too many people in that category. I was feeling kind of lazy, so I grouped them by increments of 5% African ancestry instead of strictly ordering them (in other words the people are not in order within each category).

I started at 15% because those people will probably score ˜18-20% on a K3 test, but I can post the people in the other categories as well if you're interested.

15-20% SSA



20-25% SSA

25-30% SSA

30-35% SSA

35-40% SSA


It was actually really interesting to see the results. I wouldn't so much say that they look "Black" on average, but rather that they look distinctly "not white", if that makes any sense. They look less European than mestizos with similar levels of European ancestry but most of them would be considered "trigueños" in Puerto Rico rather than "Negros".

[BirdMan]

Some Brazilian studies that (I think) haven't been posted before.

Brazil-wide



Random Samples: Alagoas, Mato Grosso do Sul, Minas Gerais, Espírito Santo, Pernambuco, São Paulo, Paraná, Santa Catarina and Rio Grande do Sul
(Of which from a paternity-test database: Pernambuco, Rio de Janeiro, Rio Grande do Sul, Santa Catarina, Paraná, São Paulo and Minas Gerais)
Federal University: Espírito Santo and Amazonas
Public School: Mato Grosso do Sul
Amerindian Communities: Sanata Isabel and Terena

Obviously, the different sampling methods likely had an effect on the results. The states where there was a random sample not from the paternity-test datsabase probably have the best/most meaningful results. Espirito Santo (university students) shows up as 74% European and Rio (paternity test cases) shows up as 55% European. I'd imagine at least some of that difference has to do with social class - university students tend to have higher SES than people involved in paternity disputes.






São Paulo City





From a blood-bank.








Brasilia







From a public high school in Brasília, fairly low average SES.
Notably, this group seems to be much more homogeneous than São Paulo.





Various Cities



Probably already posted, but interesting to compare with the other cities.


Another interesting figure, showing how people are likely to identify based on ancestry in those cities.

[RMuller]

http://slideplayer.com/slide/6614681/

That study for Hispanics is not accurate .People of Mexican origin make up 85% of the hispanics in California and Nevada and Southwest Hispanics are of Mexican origin.