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Please use this identifier to cite or link to this item: http://hdl.handle.net/10961/1631

Title: Hybridization and Population Structure of the Culex Pipiens Complex in the Islands of Macaronesia
Authors: Gomes, Bruno
Alves, Joana
Sousa, Carla A.
Santa-Ana, Marta
Vieira, Inês
Silva, Teresa
Almeida, António P.G.
Donnelly, Martin J.
Pinto, João
Keywords: Culex pipiens
Culex quinquefasciatus
Hybridization
Macaronesian islands
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.
URI: http://hdl.handle.net/10961/1631
Appears in Collections:BDCV - Documentos sobre Cabo Verde

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