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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Wilke, Andre Barretto Bruno [1] ; de Carvalho, Gabriela Cristina [2] ; Marrelli, Mauro Toledo [2]
Total Authors: 3
[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
Total Affiliations: 2
Document type: Journal article
Source: INFECTION GENETICS AND EVOLUTION; v. 65, p. 333-339, NOV 2018.
Web of Science Citations: 3

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)

FAPESP's process: 13/15313-4 - Analysis of the population structure of mosquitoes (Diptera: Culicidae) using microsatellite markers and wing morphometry
Grantee:Mauro Toledo Marrelli
Support type: Regular Research Grants
FAPESP's process: 13/18965-2 - Populational analysis of Culex quinquefasciatus and Culex nigripalpus (Diptera: Culicidae) mosquitoes based on microsatellites and wing morphometry
Grantee:Gabriela Cristina de Carvalho
Support type: Scholarships in Brazil - Doctorate