Fecundidade e genética em Kalunga : busca de associação entre dados demográficos e marcadores moleculares num remanescente de quilombo brasileiro

AUTOR(ES)

Maria Emília Cambraia Guimaro Diniz

DATA DE PUBLICAÇÃO

2008

RESUMO

Kalunga is one of the most historically and numerically important quilombos reminiscent of the Brazilian center-west region. It is located at the rural zone in the northeast of Goiás state and its population is formed by slaves descendents that organize themselves in subcommunities all over the territory without geographic isolation. The aims of this work are show the reproductive aspects of the Kalungas women and try to find possible influences of genetic markers (Haptoglobin, Catalase, HLA-G 14pb e HLA-G G*0105N) in these results. Kalunga has a populational structure similar to Brazilians rural zones, with predominance of young people, except the sex ratio that is nearly of the urban areas (0,88). The fecundity rate of 5,51 is almost twice of the Brazilian one. Most of the women have the first baby before 21 years old and a lot of gestations occurs over 40, being the space between them nearly 32 months. The years of menarche and menopause are in concordance with the literature data in other regions. Only 10% of women use any kind of contraceptive and around 43% of the female population did tubal ligation. The genotypic and genic frequencies of all markers are in conformity with the literature except G*0105N that has higher frequencies in afro-derived populations. Only the haptoglobin did not fulfill the Hardy-Weinberg Equilibrium (p=0,002) and shows genetic differences between women who had and had not abortions (p=0,003) and women with more and less than five pregnancies (p=0,044). The Kalunga population has characteristics very singulars, sometimes being similar to urban populations and sometimes like rural communities. When analysed in general, this quilombo has a similar structure to other reminiscents described in the literature, as the rural population of Brazil. The significant aspect of the genetic markers analysis was to suggest a possible association between haptoglobin polymorphisms, abortion and number of pregnancies.

ASSUNTO(S)

fecundidade marcadores genéticos ciencias da saude kalunga demografia

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