Genetic admixture estimates by Alu elements in Afro-Colombian and Mestizo populations from Antioquia, Colombia.
Ann Hum Biol
; 37(4): 488-500, 2010 Aug.
Article
en En
| MEDLINE
| ID: mdl-20113181
ABSTRACT
AIM:
This work was intended to gain insights into the admixture processes occurring in Latin American populations by examining the genetic profiles of two ethnic groups from Antioquia (Colombia). SUBJECTS ANDMETHODS:
To analyse the genetic variability, eight Alu insertions were typed in 64 Afro-Colombians and a reference group of 34 Hispanics (Mestizos). Admixture proportions were estimated using the Weighted Least Squares and the Gene Identity methods. The usefulness of the Alu elements as Ancestry Informative Markers (AIMs) was evaluated through differences in weighted allelic frequencies (delta values) and by hierarchical analysis of the molecular variance (AMOVA).RESULTS:
The Afro-Colombian gene pool was largely determined by the African component (88.5-88.8%), but the most prominent feature was the null contribution of European genes. Mestizos were characterized by a major European component (60.0-63.8%) and a comparatively low proportion of Amerindian (19.2-20.7%) and African (17.0-19.3%) genes. Five of the Alu loci examined (ACE, APO, FXIIIB, PV92 and TPA25) showed an adequate resolving power to differentiate between continental groups, as indicated by delta values and AMOVA results.CONCLUSIONS:
The peculiarity of the Afro-Colombian gene pool seems to be associated with intense genetic drift episodes that occurred in isolated communities founded by small groups of runaway slaves. ACE, APO, FXIIIB, PV92 and TPA25 could be efficiently utilized in studies dealing with demographic history and biogeographical ancestry in human populations.
Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
Etnicidad
/
Elementos Alu
/
Pool de Genes
Tipo de estudio:
Prognostic_studies
Límite:
Humans
País/Región como asunto:
Africa
/
America do sul
/
Colombia
Idioma:
En
Revista:
Ann Hum Biol
Año:
2010
Tipo del documento:
Article
País de afiliación:
España