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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 108, No. 5, 2013, pp. 605-615
Bioline Code: oc13105
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 108, No. 5, 2013, pp. 605-615

 en Distinct population structure for co-occurring Anopheles goeldii check for this species in other resources and Anopheles triannulatus check for this species in other resources in Amazonian Brazil
McKeon, Sascha Naomi; Moreno, Marta; Sallum, Maria Anise; Povoa, Marinete Marins & Conn, Jan Evelyn

Abstract

To evaluate whether environmental heterogeneity contributes to the genetic heterogeneity in Anopheles triannulatus check for this species in other resources , larval habitat characteristics across the Brazilian states of Roraima and Pará and genetic sequences were examined. A comparison with Anopheles goeldii check for this species in other resources was utilised to determine whether high genetic diversity was unique to An. triannulatus. Student t test and analysis of variance found no differences in habitat characteristics between the species. Analysis of population structure of An. triannulatus and An. goeldii revealed distinct demographic histories in a largely overlapping geographic range. Cytochrome oxidase I sequence parsimony networks found geographic clustering for both species; however nuclear marker networks depicted An. triannulatus with a more complex history of fragmentation, secondary contact and recent divergence. Evidence of Pleistocene expansions suggests both species are more likely to be genetically structured by geographic and ecological barriers than demography. We hypothesise that niche partitioning is a driving force for diversity, particularly in An. triannulatus.

Keywords
An. triannulatus; An. goeldii; population structure; COI; white gene; ITS2

 
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