Ancestry markers from the human chromosome 6: Alu repeats from the MHC in autochthonous Basques.

Abstract:

:Polymorphic Alu insertions from the MHC class I region were analyzed in 215 autochthonous Basques from Guipuzcoa and Navarre provinces, with the aim of contributing new MHC Alu data in European ancestry populations. We also seek to assess both the genetic position of native Basques among worldwide samples and the efficiency of the MHC Alu elements as ancestry informative markers (AIMs). According to the MDS and AMOVA results, worldwide populations included in the comparative analyses were grouped in three major clusters defined by genetic ancestry (Africans, Asians and Europeans). The δ values (differences in weighted allele frequencies) among ancestry groups indicated that Alu elements within the alpha-block (AluHF, AluHJ and AluHG) showed an adequate resolving power to discriminate appropriately between some of the major ancestry groups. Alpha block Alu were also revealing of the exceptionality of Basques, as they allowed for the detection of genetic heterogeneity even between Basques and the other Iberian collection considered in the analysis (Valencia). Thus, analysis of the Alu loci within the alpha-block may represent a reliable, informative and cost-effective method to explore the ancestry, geographic origins and demographic history of human populations, which can be very helpful for studies into epidemiological, forensic or evolutionary perspectives.

journal_name

Hum Immunol

journal_title

Human immunology

authors

García-Obregón S,Alfonso-Sánchez MA,Pérez-Miranda AM,Gómez-Pérez L,de Parcorbo MM,Peña JA

doi

10.1016/j.humimm.2012.04.010

subject

Has Abstract

pub_date

2012-07-01 00:00:00

pages

720-5

issue

7

eissn

0198-8859

issn

1879-1166

pii

S0198-8859(12)00103-6

journal_volume

73

pub_type

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