Distinct population structure for co-occurring Anopheles goeldii and Anopheles triannulatus in Amazonian Brazil

Memórias do Instituto Oswaldo Cruz

Sascha Naomi Mckeon¹  Marta Moreno¹  Maria Anise Sallum¹  Marinete Marins Povoa¹  Jan Evelyn Conn¹ 

关键词: An. triannulatus;    An. goeldii;    population structure;    COI;    white gene;    ITS2;   

DOI  :  10.1590/0074-0276108052013012

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY   
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