Evidence for the occurrence of two sympatric sibling species within the Anopheles Kerteszia cruziicomplex in southeast Brazil and the detection of asymmetric introgression between them using a multilocus analysisReport as inadecuate




Evidence for the occurrence of two sympatric sibling species within the Anopheles Kerteszia cruziicomplex in southeast Brazil and the detection of asymmetric introgression between them using a multilocus analysis - Download this document for free, or read online. Document in PDF available to download.

BMC Evolutionary Biology

, 13:207

Speciation and evolutionary genetics

Abstract

BackgroundAnopheles Kerteszia cruzii Diptera: Culicidae is a primary vector of human and simian malaria parasites in southern and southeastern Brazil. Earlier studies using chromosome inversions, isoenzymes and a number of molecular markers have suggested that An. cruzii is a species complex.

ResultsIn this study, a multilocus approach using six loci, three circadian clock genes and three encoding ribosomal proteins, was carried out to investigate in more detail the genetic differentiation between the An. cruzii populations from Florianópolis–Santa Catarina southern Brazil and Itatiaia–Rio de Janeiro States southeastern Brazil. The analyses were performed first comparing Florianópolis and Itatiaia, and then comparing the two putative sympatric incipient species from Itatiaia Itatiaia A and Itatiaia B. The analysis revealed high FST values between Florianópolis and Itatiaia considering Itatiaia A and B together and also between the sympatric Itatiaia A and Itatiaia B, irrespective of their function. Also, using the IM program, no strong indication of migration was found between Florianópolis and Itatiaia considering Itatiaia A and B together using all loci together, but between Itatiaia A and Itatiaia B, the results show evidence of migration only in the direction of Itatiaia B.

ConclusionsThe results of the multilocus analysis indicate that Florianópolis and Itatiaia represent different species of the An. cruzii complex that diverged around 0.6 Mya, and also that the Itatiaia sample is composed of two sympatric incipient species A and B, which diverged around 0.2 Mya. Asymmetric introgression was found between the latter two species despite strong divergence in some loci.

KeywordsAnopheles Speciation Complex of cryptic species Multilocus analysis Malaria Mosquitoes Electronic supplementary materialThe online version of this article doi:10.1186-1471-2148-13-207 contains supplementary material, which is available to authorized users.

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Author: Luísa DP Rona - Carlos J Carvalho-Pinto - Alexandre A Peixoto

Source: https://link.springer.com/







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