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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.)

Genetic-morphometric variation in Culex quinquefasciatus from Brazil and La Plata, Argentina

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de Morais, Sirlei Antunes [1] ; Moratore, Camila [2, 3] ; Suesdek, Lincoln [2, 3] ; Marrelli, Mauro Toledo [1]
Total Authors: 4
[1] Univ Sao Paulo, Fac Saude Publ, Dept Epidemiol, BR-01255 Sao Paulo - Brazil
[2] Univ Sao Paulo, Inst Ciencias Biomed, BR-05508 Sao Paulo - Brazil
[3] Inst Butantan, Secao Parasitol, Sao Paulo - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Memórias do Instituto Oswaldo Cruz; v. 105, n. 5, p. 672-676, AUG 2010.
Web of Science Citations: 20

Variation among natural populations of Culex (Culex) quinquefasciatus Say is associated with different vectorial capacities. The species Cx. quinquefasciatus is present in the equatorial, tropical and subtropical zones in the Brazilian territory, with intermediate forms between Cx. quinquefasciatus and Culex pipiens occurring in regions of latitudes around 33 degrees-35 degrees S. Herein, we studied geographically distinct populations of Cx. quinquefasciatus by genetic characterization and analysis of intra-specific wing morphometrics. After morphological analysis, molecular characterization of Cx. quinquefasciatus and intermediate forms was performed by polymerase chain reaction of the polymorphic nuclear region of the second intron of the acetylcholinesterase locus. Additionally, the morphology of adult female wings collected from six locations was analyzed. Wing centroid sizes were significantly different between some geographical pairs. Mean values of R(2)/R(2+3) differed significantly after pairwise comparisons. The overall wing shape represented by morphometric characters could be divided into two main groupings. Our data suggest that Brazilian samples are morphologically and genetically distinct from the Argentinean samples and also indicated a morphological distinction between northern and southern populations of Brazilian Cx. quinquefasciatus. We suggest that wing morphology may be used for preliminary assessment of population structure of Cx. quinquefasciatus in Brazil. (AU)

FAPESP's process: 06/02622-5 - Populational characterization of Culicidae of medical importance: molecular, karyotypic and morphometric aspects
Grantee:Lincoln Suesdek Rocha
Support type: Regular Research Grants
FAPESP's process: 05/50225-2 - Development of alternative methodologies in the control of mosquitoes (Diptera: culicidae) of epidemiological importance: use of method RIDL (release of insects carrying a dominant lethal gene) in the control of Culex quinquefasciatus mosquitoes
Grantee:Mauro Toledo Marrelli
Support type: Research Grants - Young Investigators Grants