A preliminary analysis of the population genetics and molecular phylogenetics of Onchocerca volvulus (Nematoda: Filarioidea) using nuclear ribosomal second internal transcribed spacer sequences
Mem. Inst. Oswaldo Cruz
; 102(7): 879-882, Nov. 2007. ilus, tab
Article
em En
| LILACS
| ID: lil-470351
Biblioteca responsável:
BR1.1
ABSTRACT
Nuclear internal transcribed spacer 2 (ITS2) rDNA sequences were used for a molecular phylogenetics analysis of five Onchocerca species. The sister species of the human parasite O. volvulus was found to be the cattle parasite O. ochengi and not O. gibsoni, contrary to chromosomal evidence. The genetic differentiation of two African populations (representing the two African strains) and a Brazilian population of O. volvulus was also studied. Phylogenetic and network reconstruction did not show any clustering of ITS2 alleles on geographic or strain grounds. Furthermore, population genetics tests showed no indication of population differentiation but suggested gene flow among the three populations.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
LILACS
Assunto principal:
Transcrição Gênica
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Variação Genética
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Onchocerca volvulus
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DNA de Helmintos
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DNA Espaçador Ribossômico
Limite:
Animals
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Humans
Idioma:
En
Ano de publicação:
2007
Tipo de documento:
Article