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Genetic admixture patterns in Argentinian Patagonia.

María Laura Parolin1, Ulises F Toscanini2, Irina F Velázquez1

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Argentinian Patagonia

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Area of Science:

  • Population genetics
  • Anthropology
  • Forensic science

Background:

  • Argentinians exhibit admixture from Native American, European, and African ancestries.
  • Admixture patterns vary geographically within Argentina.
  • Understanding regional genetic structure is crucial for research.

Purpose of the Study:

  • To investigate the population genetic structure of Argentinian Patagonia.
  • To analyze admixture proportions in five distinct Patagonian localities.
  • To correlate genetic ancestry with geographic origins.

Main Methods:

  • Analysis of 46 ancestry informative markers (AIMs).
  • Study included 433 individuals from five Patagonian localities.
  • Combined genetic data with genealogical information.

Main Results:

  • Average ancestry in Patagonia: 35.8% Native American, 62.1% European, 2.1% African.
  • Significant differences in Native American and European ancestry across localities.
  • Ancestry proportions correlated with grandparents' birth regions (e.g., Europe, North, South Argentina, Chile).

Conclusions:

  • Continental ancestry contributions vary significantly within Argentinian Patagonia.
  • Regional differences in ancestry reflect distinct historical admixture processes.
  • Knowledge of participant and ancestral origins is vital for genetic data interpretation.