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|Title: ||Hybridization and Population Structure of the Culex Pipiens Complex in the Islands of Macaronesia|
|Authors: ||Gomes, Bruno|
Sousa, Carla A.
Almeida, António P.G.
Donnelly, Martin J.
|Keywords: ||Culex pipiens|
West Nile virus
|Issue date: ||5-Jun-2012|
|Abstract: ||The Culex pipiens complex includes two widespread mosquito vector species,
Cx. pipiens and Cx. quinquefasciatus. The distribution of these species varies in
latitude, with the former being present in temperate regions and the latter in
tropical and subtropical regions. However, their distribution range overlaps in
certain areas and interspecific hybridization has been documented. Genetic
introgression between these species may have epidemiological repercussions for
West Nile virus (WNV) transmission. Bayesian clustering analysis based on
multilocus genotypes of 12 microsatellites was used to determine levels of
hybridization between these two species in Macaronesian islands, the only contact
zone described in West Africa. The distribution of the two species reflects
both the islands’ biogeography and historical aspects of human colonization.
Madeira Island displayed a homogenous population of Cx. pipiens, whereas
Cape Verde showed a more intriguing scenario with extensive hybridization. In
the islands of Brava and Santiago, only Cx. quinquefasciatus was found, while in
Fogo and Maio high hybrid rates (~40%) between the two species were
detected. Within the admixed populations, second-generation hybrids (~50%)
were identified suggesting a lack of isolation mechanisms. The observed levels
of hybridization may locally potentiate the transmission to humans of zoonotic
arboviruses such as WNV.|
|Appears in Collections:||BDCV - Documentos sobre Cabo Verde|
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