Ancestry dynamics in a South American population: The impact of gene flow and preferential mating

摘要: Objectives European ancestry in many populations Latin America at autosomal loci is often higher than that from X-linked indicating more European male and Amerindian female ancestry. Generally, this has been attributed to gene flow but could also result an advantage mating or reproductive success. Methods Population genetic models were developed investigate the dynamics of success. Using estimates X-chromosome ancestry, amount for Europeans, those with was estimated. Results In a population Antioquia, Colombia estimated 79% 69% about 15% Europe 20% Europeans over Amerindians resulted these levels contemporary population. Combinations nearly additive their impact. Conclusions Gene flow, advantage, combination both factors, are consistent observed American This approach provides general methodology determine differences can explain autosomes X-chromosomes.