Data/hora: 09/06/2024 01:26:49

Provedor de dados: | 74
País: | Brazil
Título: | Evidence of two lineages of the dengue vector Aedes aegypti in the Brazilian Amazon, based on mitochondrial DNA ND4 gene sequences
Autores: | Lima Júnior,Raimundo Sousa; Scarpassa,Vera Margarete.
Data: | 2009-01-01
Ano: | 2009
Palavras-chave: | Aedes aegypti; Dengue vector; Genetic structure; Gene flow; Brazilian Amazon; Genetic lineages.
Resumo: | Genetic variation was estimated in ten samples populations of Aedes aegypti from the Brazilian Amazon, by using a 380 bp fragment of the mitochocondrial NADH dehydrogenase subunit 4 (ND4) gene. A total of 123 individuals were analyzed, whereby 13 haplotypes were found. Mean genetic diversity was slightly high (h = 0.666 ± 0.029; π = 0.0115 ± 0.0010). Two AMOVA analyses indicated that most of the variation (~70%-72%) occurred within populations. The variation found among and between populations within the groups disclosed lower, but even so, highly significant values. F ST values were not significant in most of the comparisons, except for the samples from Pacaraima and Rio Branco. The isolation by distance (IBD) model was not significant (r = 0.2880; p = 0.097) when the samples from Pacaraima and Rio Branco were excluded from the analyses, this indicating that genetic distance is not related to geographic distance. This result may be explained either by passive dispersal patterns (via human migrations and commercial exchange) or be due to the recent expansion of this mosquito in the Brazilian Amazon. Phylogenetic relationship analysis showed two genetically distinct groups (lineages) within the Brazilian Amazon, each sharing haplotypes with populations from West Africa and Asia.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000200032
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-47572009005000036
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.32 n.2 2009
Fonte: | info:eu-repo/semantics/openAccess