Please use this identifier to cite or link to this item: https://www.arca.fiocruz.br/handle/icict/7107
Title: Biogeography of Brazilian populations of Panstrongylus megistus (Hemiptera, Reduviidae, Triatominae) based on molecular marker and paleo-vegetational data
Authors: Barbosa, Silvia Ermelinda
Belisário, Carlota Josefovicz
Souza, Rita de Cássia Moreira de
Paula, Alexandre Silva de
Linardi, Pedro Marcos
Romanha, Álvaro José
Diotaiuti, Liléia Gonçalves
Affilliation: Fundação Oswaldo Cruz. Centro de Pesquisas Rene Rachou. Belo Horizonte, MG, Brazil/Universidade Federal de Minas Gerais. Departamento de Parasitologia. Belo Horizonte, MG, Brazil
Fundação Oswaldo Cruz. Centro de Pesquisas Rene Rachou. Belo Horizonte, MG, Brazil
Fundação Oswaldo Cruz. Centro de Pesquisas Rene Rachou. Belo Horizonte, MG, Brazil
Fundação Oswaldo Cruz. Centro de Pesquisas Rene Rachou. Belo Horizonte, MG, Brazil
Universidade Federal de Minas Gerais. Departamento de Parasitologia. Belo Horizonte, MG, Brazil
Fundação Oswaldo Cruz. Centro de Pesquisas Rene Rachou. Belo Horizonte, MG, Brazil
Fundação Oswaldo Cruz. Centro de Pesquisas Rene Rachou. Belo Horizonte, MG, Brazil
Abstract: In epidemiological terms, Panstrongylus megistus is one of the most important species of triatomine bug in Brazil. Samples from 11 localities were studied using the random amplification of polymorphic DNA (RAPD) technique, which was able to differentiate the study populations clearly. Biogeographical data indicate that these populations could already have arisen 18 000 years ago (C 14 ), it being possible to differentiate insects from the Brazilian states of Santa Catarina (SC) in the south, Cear ´a (CE) in the northeast and another large intermediate block containing the remaining eight populations from five other states. These results agree with those obtained by phenograms constructed from RAPD data, in which the SC population lies opposite those of CE, consistent with the greatest geographical distance between these localities. The other eight populations (Alagoas (AL), Bahia (BA), Goi ´as (GO), Minas Gerais (MG) and S ˜ao Paulo (SP)) are closer genetically and originated in areas whose vegetational characteristics have remained similar to each other during the last 18 000 years, thus allowing greater contact between them. The greatest divergence of this group of insects and those of Cear ´a appears to have occurred 8000 years ago. This more humid period gave rise to other landscape changes, allowing greater differentiation of the vegetation and consequent expansion of P. megistus populations. Formation of the Serras do Mar and Mantiqueira probably created geographical barriers that favored a certain degree of isolation and greater differentiation of the SC population. Atlantic forest remnants within the caatinga domain (created between 25 and 17 000 years ago), where the CE populations originated probably constitute ecological refugia produced by successive amplification and retraction of the most suitable habitats for this species.
Keywords: Triatomines
Panstrongylus megistus
RAPD
Biogeography
Numerical taxonomy
Issue Date: 2006
Publisher: Elsevier
Citation: BARBOSA, Silvia Ermelinda et al. Biogeography of Brazilian populations of Panstrongylus megistus (Hemiptera, Reduviidae, Triatominae) based on molecular marker and paleo-vegetational data. Acta Tropica. 2006; 99(2): 144-154
ISSN: 0001706X
Copyright: restricted access
Appears in Collections:MG - IRR - Artigos de Periódicos

Files in This Item:
File Description SizeFormat 
16.pdf1.13 MBAdobe PDFThumbnail
    Request a copy


FacebookTwitterDeliciousLinkedInGoogle BookmarksBibTex Format mendeley Endnote DiggMySpace

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.