Amerindian admixture estimation based on serological and molecular methods

• Published in: Revista medíca de Chile Vol. 143; no. 4; p. 439
• Main Authors: Pulgar-Alarcón, Iván, Fuentes-Guajardo, Macarena, Llop, Elena, Rothhammer, Francisco
• Format: Journal Article
• Language: Spanish
• Published: Chile 01.04.2015
• Subjects: ABO Blood-Group System - genetics; Chile - ethnology; European Continental Ancestry Group - genetics; Female; Gene Frequency - genetics; Genetic Markers - genetics; Genetics, Population; Humans; Indians, South American - genetics; Male; Phenotype; Polymorphism, Single Nucleotide - genetics; Reproducibility of Results; Chile
• ISSN: 0717-6163; 0717-6163
• DOI: 10.4067/S0034-98872015000400004

Amerindian admixture is an important parameter to consider in epidemiological studies in American countries, to make a proper selection of cases and controls. To compare Amerindian admixture estimates obtained using ABO*A and ABO*O blood group alleles and ancestral identity markers (AIMs) in the mixed Chilean population. Amerindian admixture rates were determined in 720 Chilean volunteers residing in Arica and born in the 15 regions of the country, using ABO*O and ABO*A alleles and 40 AIMs selected from more than 500,000 single nucleotide polymorphisms (SNPs). Mean admixture estimates obtained using ABO*O and ABO*A alleles and AIMs were 35, 47% and 48% respectively. There was concordance in estimates, with the exception of the admixture based on ABO*O allele and AIMs. In Chile, Amerindian admixture estimates obtained using ABO*A could be used as an alternative to AIMs in justified cases provided the sample size is reasonably large.