Brazilian Genetic Results Thread

[Jingle Bell]

Idk if theres alr a thread focused in make a compilation of Brazilians results, from any kind of companies, g25, qpAdm, with some historical/familiar context would be good, feel free to link videos, articles, shorts, imgur pics and etc, the objective here is try make a good average for all the states in Brazil, contribuitions are always welcome!

[Laredo]

What Is qpAdm? mind to explain to me like If you were telling an none athrotard person? Is It like G25 or suppose to be better?

[Beowulf]

What Is qpAdm? mind to explain to me like If you were telling an none athrotard person? Is It like G25 or suppose to be better?

https://pubmed.ncbi.nlm.nih.gov/33772284/


"qpAdm is a statistical tool for studying the ancestry of populations with histories that involve admixture between two or more source populations. Using qpAdm, it is possible to identify plausible models of admixture that fit the population history of a group of interest and to calculate the relative proportion of ancestry that can be ascribed to each source population in the model. Although qpAdm is widely used in studies of population history of human (and nonhuman) groups, relatively little has been done to assess its performance. We performed a simulation study to assess the behavior of qpAdm under various scenarios in order to identify areas of potential weakness and establish recommended best practices for use. We find that qpAdm is a robust tool that yields accurate results in many cases, including when data coverage is low, there are high rates of missing data or ancient DNA damage, or when diploid calls cannot be made. However, we caution against co-analyzing ancient and present-day data, the inclusion of an extremely large number of reference populations in a single model, and analyzing population histories involving extended periods of gene flow. We provide a user guide suggesting best practices for the use of qpAdm."

[Laredo]

https://pubmed.ncbi.nlm.nih.gov/33772284/


"qpAdm is a statistical tool for studying the ancestry of populations with histories that involve admixture between two or more source populations. Using qpAdm, it is possible to identify plausible models of admixture that fit the population history of a group of interest and to calculate the relative proportion of ancestry that can be ascribed to each source population in the model. Although qpAdm is widely used in studies of population history of human (and nonhuman) groups, relatively little has been done to assess its performance. We performed a simulation study to assess the behavior of qpAdm under various scenarios in order to identify areas of potential weakness and establish recommended best practices for use. We find that qpAdm is a robust tool that yields accurate results in many cases, including when data coverage is low, there are high rates of missing data or ancient DNA damage, or when diploid calls cannot be made. However, we caution against co-analyzing ancient and present-day data, the inclusion of an extremely large number of reference populations in a single model, and analyzing population histories involving extended periods of gene flow. We provide a user guide suggesting best practices for the use of qpAdm."

Million thanks!

[Leto]

I read this subreddit (not registered) and have seen this one recently - a majority black Brazilian (Blackzilian) from Northeastern Brazil

60.8% Sub-Saharan African
31.7% European
5.3% Indigenous American
0.5% East Asian
0.5% Western Asian & North African
1.2% trace & unassigned
https://www.reddit.com/r/23andme/com...theast_brazil/

Unusual Y DNA - T-L280, mtDNA is African - L1b1a

[Leto]

I read this subreddit (not registered) and have seen this one recently - a majority black Brazilian (Blackzilian) from Northeastern Brazil

60.8% Sub-Saharan African
31.7% European
5.3% Indigenous American
0.5% East Asian
0.5% Western Asian & North African
1.2% trace & unassigned
https://www.reddit.com/r/23andme/com...theast_brazil/

Unusual Y DNA - T-L280, mtDNA is African - L1b1a

Just to clarify that I wasn't trolling the Brazilians as blacks, here's a Southern Brazilian, almost 90% Caucasoid (88.9% European, 0.5% WANA; 6.6% Indigenous; 3.5% SSA). I'll stop with this 'cause you know where to find those results
https://www.reddit.com/r/23andme/com...lian_with_pic/

[Laredo]

Just to clarify that I wasn't trolling the Brazilians as blacks, here's a Southern Brazilian, almost 90% Caucasoid (88.9% European, 0.5% WANA; 6.6% Indigenous; 3.5% SSA). I'll stop with this 'cause you know where to find those results
https://www.reddit.com/r/23andme/com...lian_with_pic/

Well neither of them are representative average .. Still the average Southern Brazilian Is more like 75-79 European.

[Jingle Bell]

Well neither of them are representative average .. Still the average Southern Brazilian Is more like 75-79 European.

Higher prevalence of European ancestry was observed for populations from all Brazilian states, and the highest was identified in Rio Grande do Sul (RS) (81.5%). On the contrary, the Maranhão state (MA) showed the lowest percentage of European ancestry (42.0%). Bahia (BA) showed the highest percentage of African ancestry (38.6%), while the lowest percentage was observed in Rio Grande do Sul (9.8%). Native American ancestry was highest in Maranhão (AM) (39%) and lowest in Minas Gerais state (MG) (6.8%).

[Laredo]

Higher prevalence of European ancestry was observed for populations from all Brazilian states, and the highest was identified in Rio Grande do Sul (RS) (81.5%). On the contrary, the Maranhão state (MA) showed the lowest percentage of European ancestry (42.0%). Bahia (BA) showed the highest percentage of African ancestry (38.6%), while the lowest percentage was observed in Rio Grande do Sul (9.8%). Native American ancestry was highest in Maranhão (AM) (39%) and lowest in Minas Gerais state (MG) (6.8%).

I think the Northern Brazilian province are similar to Venezuela when It comes to the SSA and Native triracial compounds?

[Jingle Bell]

I think the Northern Brazilian province are similar to Venezuela when It comes to the SSA and Native triracial compounds?

Yes but i think Venezuela is more European than states like Amazonas