Distinct population structure for co-occurring Anopheles goeldii and Anopheles triannulatus in Amazonian Brazil
Mem. Inst. Oswaldo Cruz
;
108(5): 605-615, ago. 2013. tab, graf
Article
in English
| LILACS
| ID: lil-680764
ABSTRACT
To evaluate whether environmental heterogeneity contributes to the genetic heterogeneity in Anopheles triannulatus, larval habitat characteristics across the Brazilian states of Roraima and Pará and genetic sequences were examined. A comparison with Anopheles goeldii 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.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Genetic Variation
/
Insect Vectors
/
Anopheles
Limits:
Animals
Country/Region as subject:
South America
/
Brazil
Language:
English
Journal:
Mem. Inst. Oswaldo Cruz
Journal subject:
Tropical Medicine
/
Parasitology
Year:
2013
Type:
Article
/
Project document
Affiliation country:
United States
Institution/Affiliation country:
State University of New York/US
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