On the number of genealogical ancestors tracing to the source groups of an admixed population.

ABSTRACT: Members of genetically admixed populations possess ancestry from multiple source groups, and studies of human genetic admixture frequently estimate ancestry components corresponding to fractions of individual genomes that trace to specific ancestral populations. However, the same numerical ancestry fraction can represent a wide array of admixture scenarios within an individual's genealogy. Using a mechanistic model of admixture, we consider admixture genealogically: how many ancestors from the source populations does the admixture represent? We consider African-Americans, for whom continent-level estimates produce a 75-85% value for African ancestry on average and 15-25% for European ancestry. Genetic studies together with key features of African-American demographic history suggest ranges

SUBMITTER: Mooney JA 

PROVIDER: S-EPMC10324943 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature