Population structuring of the tsetse Glossina tachinoides resulting from landscape fragmentation in the Mouhoun River basin,Burkina Faso |
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| Authors: | N KONE T DE MEEÛS J BOUYER S RAVEL L GUERRINI E K N’GORAN L VIAL |
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| Institution: | 1. Centre International de Recherche‐Développement sur l’élevage en Zone Subhumide, Bobo Dioulasso, Burkina Faso;2. Unité de Formation et de Recherche Biosciences, University of Abidjan, Abidjan, Ivory Coast;3. Génétique et Evolution des Maladies Infectieuses, Unité Mixte de Recherches 2724 Institut de Recherche pour le Développement‐Centre National de la Recherche Scientifique, Centre International de Recherche‐Développement de Montpellier, Montpellier, France;4. Unité Mixte de Recherches Institut de Recherches sur le Développement‐Centre de coopération International en Recherche Agronomique pour le Développement 177, Laboratoire de Recherches et de Coordination sur les Trypanosomoses, Campus de Baillarguet, Montpellier, France;5. UMR 15 CIRAD‐INRA Contr?le des maladies animales exotiques et émergentes, Centre de coopération Internationale en Recherche Agronomique pour le Développement, Montpellier, France |
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| Abstract: | The impact of landscape fragmentation resulting from human‐ and climate‐mediated factors on the structure of a population of Glossina tachinoides Westwood (Diptera: Glossinidae) in the Mouhoun River basin, Burkina Faso, was investigated. Allele frequencies at five microsatellite loci were compared in four populations. The average distance between samples was 72 km. The sampling points traversed an ecological cline in terms of rainfall and riverine forest ecotype, along a river loop that enlarged from upstream to downstream. Microsatellite DNA demonstrated no structuring among the groups studied (FST = 0.015, P = 0.07), which is contrary to findings pertaining to Glossina palpalis gambiensis Vanderplank in the same geographical area. The populations of G. tachinoides showed complete panmixia (FIS = 0, P = 0.5 for the whole sample) and no genetic differentiation among populations or global positioning system trap locations. This is in line with the results of dispersal studies which indicated higher diffusion coefficients for G. tachinoides than for G. p. gambiensis. The impact of these findings is discussed within the framework of control campaigns currently promoted by the Pan African Tsetse and Trypanosomosis Eradication Campaign. |
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| Keywords: | Glossina tachinoides microsatellite DNA population genetics Burkina Faso |
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