Retention of ancestral polymorphism in Culex nigripalpus (Diptera: Culicidae) from Sao Paulo, Brazil

Autor(es)

Wilke, Andre Barretto Bruno ^[1] ; de Carvalho, Gabriela Cristina ^[2] ; Marrelli, Mauro Toledo ^[2]

Afiliação do(s) autor(es)

^[1] Univ Miami, Miller Sch Med, Dept Publ Hlth Sci, Miami, FL 33136 - USA

^[2] Univ Sao Paulo, Sch Publ Hlth, Dept Epidemiol, Av Dr Arnaldo 715, BR-01246904 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INFECTION GENETICS AND EVOLUTION; v. 65, p. 333-339, NOV 2018.
• Citações Web of Science: 4

Resumo

Culex nigripalpus Theobald (Diptera: Culicidae) is a native species of Brazil that is well adapted to urban environments and found extensively in the city of Sao Paulo, Brazil. As a native species, it has been present in this region since long before the foundation of the city, but over time Cx. nigripalpus populations have been affected by man-made changes to the environment. We hypothesize that the populations analyzed in this study constituted a large Cx. nigripalpus population that separated into smaller populations as a result of increased levels of urbanization in the city, and that such high levels of urbanization would result in a genetic homogenization effect. We therefore investigated the microgeographic genetic structure and microevolutionary processes in Cx. nigripalpus populations from seven different locations in the city of Sao Paulo using a set of six microsatellite primers originally developed for Culex quinquefasciatus and Culex pipiens. Our results indicate that Cx. nigripalpus did not benefit from urbanization and is currently under selective pressures caused by anthropogenic changes and that populations from areas with higher levels of urbanization exhibited similar genetic patterns and low levels of polymorphism, contrasting with the more sylvatic SHA population. These findings are likely to contribute to a better understanding of how anthropogenic selective pressures are driving population genetics and, to some extent, the dynamics of Cx. nigripalpus populations. They should also help elucidate the effects that urbanization processes have on the ecology and behavior of these mosquito populations. (AU)

• Processo FAPESP: 13/15313-4 - Análise da estrutura populacional de mosquitos (Diptera: Culicidae) utilizando marcadores microssatélites e morfometria alar
• Beneficiário: Mauro Toledo Marrelli
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/18965-2 - Análise da estrutura populacional de Mosquitos Culex quinquefasciatus e Culex nigripalpus (Diptera: Culicidae) utilizando microssatélites e análise de morfometria de asas
• Beneficiário: Gabriela Cristina de Carvalho
• Modalidade de apoio: Bolsas no Brasil - Doutorado