Genetic signatures of parental contribution in black and white populations in Brazil
Genet. mol. biol
;
32(1): 1-11, 2009.
Article
Dans Anglais
| LILACS
| ID: lil-505785
ABSTRACT
Two hundred and three individuals classified as white were tested for 11 single nucleotide polymorphisms plus two insertion/deletions in their Y-chromosomes. A subset of these individuals (n = 172) was also screened for sequences in the first hypervariable segment of their mitochondrial DNA (mtDNA). In addition, complementary studies were done for 11 of the 13 markers indicated above in 54 of 107 black subjects previously investigated in this southern Brazilian population. The prevalence of Y-chromosome haplogroups among whites was similar to that found in the Azores (Portugal) or Spain, but not to that of other European countries. About half of the European or African mtDNA haplogroups of these individuals were related to their places of origin, but not their Amerindian counterparts. Persons classified in these two categories of skin color and related morphological traits showed distinct genomic ancestries through the country. These findings emphasize the need to consider in Brazil, despite some general trends, a notable heterogeneity in the pattern of admixture dynamics within and between populations/groups.
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
ADN mitochondrial
/
Dynamique des populations
/
Hétérogénéité génétique
/
Chromosomes Y humains
Type d'étude:
Facteurs de risque
Limites du sujet:
Humains
Pays comme sujet:
Amérique du Sud
/
Brésil
/
Europe
langue:
Anglais
Texte intégral:
Genet. mol. biol
Thème du journal:
Génétique
Année:
2009
Type:
Article
Pays d'affiliation:
Brésil
Institution/Pays d'affiliation:
Universidade Federal do Rio Grande do Sul/BR
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