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): 879-82, 2007 Nov.
Article
em En
| MEDLINE
| ID: mdl-17992364
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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Base de dados:
MEDLINE
Assunto principal:
Transcrição Gênica
/
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