Por favor, use este identificador para citar o enlazar este ítem:
https://www.arca.fiocruz.br/handle/icict/10195
Tipo
ArtículoDerechos de autor
Acceso abierto
Colecciones
- IOC - Artigos de Periódicos [12642]
Metadatos
Mostrar el registro completo del ítem
HYBRID STERILITY IN CROSSES BETWEEN TWO BRAZILIAN SIBLING SPECIES OF THE ANOPHELES ALBITARSIS COMPLEX
Anopheles albitarsis s.s
Anopheles marajoara
Hybrid sterility
Haldane’s rule
Malaria
Speciation
Autor
Afiliación
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Fisiologia e Controle de Artrópodes Vetores. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Biologia Molecular de Insetos. Rio de Janeiro, RJ, Brasil.
Instituto de Pesquisas Científicas e Tecnológicas de Estado do Amapá. Macapá, AP, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Biologia Molecular de Insetos. Rio de Janeiro, RJ, Brasil
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Fisiologia e Controle de Artrópodes Vetores. Rio de Janeiro, RJ, Brasil / Instituto de Biologia do Exército. Laboratório de Entomologia. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Biologia Molecular de Insetos. Rio de Janeiro, RJ, Brasil.
Instituto de Pesquisas Científicas e Tecnológicas de Estado do Amapá. Macapá, AP, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Biologia Molecular de Insetos. Rio de Janeiro, RJ, Brasil
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Fisiologia e Controle de Artrópodes Vetores. Rio de Janeiro, RJ, Brasil / Instituto de Biologia do Exército. Laboratório de Entomologia. Rio de Janeiro, RJ, Brasil.
Resumen en ingles
Background
Complexes of cryptic species are common in several taxa and this is also the case in the Anopheles genus, a group including all known human malaria vectors. The Anopheles albitarsis complex comprises at least nine cryptic species, some of which are implicated as vectors of human malaria. Several different types of data have been generated for this species complex such as cytogenetics, alloenzymes, morphological and feeding behavioral, hybridization experiments, RAPD-PCR and RFLP and mitochondrial and nuclear markers. Studies focused on its postzygotic isolation are still somewhat rare in the literature despite their importance to understand the speciation process and the level of gene flow potentially occurring among the different sibling species.
Methods
Hybridization experiments between Anopheles albitarsis s.s. and Anopheles marajoara, as well as backcrosses between hybrids and Anopheles albitarsis s.s., were performed using the induced mating technique. Results were compared to intraspecific crosses. Larva-to-adult viability and sex ratio were also assessed.
Results
Male hybrids show very low insemination rates and nearly complete sterility, apparently due to abnormalities in their reproductive organs. Evidence of partial sterility among the hybrid females was also observed.
Conclusions
Our data indicated that Anopheles albitarsis s.s. and Anopheles marajoara show a high level of postzygotic isolation with a strong hybrid male sterility. This result is consistent with the Haldane’s rule which states that in interspecific crosses the heterogametic sex is the first to be affected. However, the fact that the females are not completely sterile raises the possibility of introgression between these two siblings species.
Palabras clave en ingles
Anopheles albitarsis complexAnopheles albitarsis s.s
Anopheles marajoara
Hybrid sterility
Haldane’s rule
Malaria
Speciation
Compartir