Tomenable
Elite member
- Messages
- 5,419
- Reaction score
- 1,337
- Points
- 113
- Location
- Poland
- Ethnic group
- Polish
- Y-DNA haplogroup
- R1b-L617
- mtDNA haplogroup
- W6a
Fig. 1. shows proportions of Euro and Native admixtures in several countries:
Study: https://www.biorxiv.org/content/early/2018/01/23/252155
PDF: https://www.biorxiv.org/content/early/2018/01/23/252155.full.pdf
Supplements: https://www.biorxiv.org/content/biorxiv/suppl/2018/01/23/252155.DC1/252155-1.pdf
Also significant Italian and German admixtures in Southern Brazil were detected.
Study: https://www.biorxiv.org/content/early/2018/01/23/252155
PDF: https://www.biorxiv.org/content/early/2018/01/23/252155.full.pdf
Supplements: https://www.biorxiv.org/content/biorxiv/suppl/2018/01/23/252155.DC1/252155-1.pdf
Historical records and genetic analyses indicate that Latin Americans trace their ancestry mainly to the admixture of Native Americans, Europeans and Sub-Saharan Africans. Using novel haplotype-based methods here we infer the sub-populations involved in admixture for over 6,500 Latin Americans and evaluate the impact of sub-continental ancestry on the physical appearance of these individuals. We find that pre-Columbian Native genetic structure is mirrored in Latin Americans and that sources of non-Native ancestry, and admixture timings, match documented migratory flows. We also detect South/East Mediterranean ancestry across Latin America, probably stemming from the clandestine colonial migration of Christian converts of non-European origin (Conversos). Furthermore, we find that Central Andean ancestry impacts on variation of facial features in Latin Americans, particularly nose morphology, possibly relating to environmental adaptation during the evolution of Native Americans.
Allele-based analyses have previously documented that broad patterns of Native American population structure are detectable in admixed Latin Americans6,7. SOURCEFIND analysis extends these results by enabling the inference of 25 Native American ancestry components across Latin America, resulting in a high-resolution picture of Native variation in the region (Figures 1B and 2A) and emphasizing the “genetic continuity” of pre-Columbian and admixed populations across the Americas. In addition, SOURCEFIND distinguishes between closely-related ancestry components from the Iberian Peninsula, as well as from the East and South Mediterranean (including individuals self-identified as Sephardic; i.e. Iberian Jews). The distribution of European ancestry in the CANDELA sample shows a sharp differentiation between Brazil and the Spanish American countries (Fig. 1C). In Brazil the predominant European sub-component matches mostly the Portugal/West-Spain reference group while in Mexico, Colombia, Peru and Chile mostly Central/South-Spanish ancestry is inferred (Figures 1C and 2B). This differentiation matches the colonial history, Portuguese migration having concentrated in Eastern South America while the Spanish settled mainly in Central America and Western South America1. The relatively small contribution inferred for the Basque and Catalan agrees with historical information documenting that Spanish migrants to America originated mainly in Southern and Central Spain8.
Also significant Italian and German admixtures in Southern Brazil were detected.