Extensive linkage disequilibrium in small human populations in Eurasia.
Am J Hum Genet
; 70(3): 673-85, 2002 Mar.
Article
em En
| MEDLINE
| ID: mdl-11813132
ABSTRACT
The extent of linkage disequilibrium (LD) was studied in two small food-gathering populations-Evenki and Saami-and two larger food-producing populations-Finns and Swedes-in northern Eurasia. In total, 50 single-nucleotide polymorphisms (SNPs) from five genes were genotyped using real-time pyrophosphate DNA sequencing, whereas 14 microsatellites were genotyped in two X-chromosomal regions. In addition, hypervariable region I of the mtDNA was sequenced to shed light on the demographic history of the populations. The SNP data, as well as the microsatellite data, reveal extensive levels of LD in Evenki and Saami when compared to Finns and Swedes. mtDNA-sequence variation is compatible with constant population size over time in Evenki and Saami but indicates population expansion in Finns and Swedes. Furthermore, the similarity between Finns and Swedes in SNP allele- and haplotype-frequency distributions indicate that these two populations may share a recent common origin. These findings suggest that populations such as the Evenki and the Saami, rather than the Finns, may be particularly suited for the initial coarse mapping of common complex diseases.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Cromossomo X
/
DNA Mitocondrial
/
Desequilíbrio de Ligação
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Repetições de Microssatélites
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Polimorfismo de Nucleotídeo Único
Limite:
Humans
País/Região como assunto:
Asia
/
Europa
Idioma:
En
Ano de publicação:
2002
Tipo de documento:
Article