title: Understanding local population genetics of tsetse: the case of an isolated population of Glossina palpalis gambiensis in Burkina Faso.
abstract: Tsetse flies are the vectors of human and animal trypanosomiases. For tsetse eradication programs, it is crucial to be able to identify and target isolated populations, because they can be targeted for eradication without risk of reinvasion. However, most data that are available on non-isolated populations fail to find how these populations are locally structured, because Wahlund effect (admixture of individuals from genetically different units) always interfere with interpretations. In this paper, we investigated the genetic population structure of a possibly isolated population of Glossina palpalis gambiensis in a sacred wood in South Burkina Faso, using microsatellite DNA markers. We found that genotypic proportions in this population were in agreement with random mating model and that these tsetse were genetically highly differentiated from other populations of the same Mouhoun river basin only a few kilometers away, confirming its genetic isolation. The population also displayed substantial temporal differentiation in a two years period that lead to an estimate of effective population size of ∼100 individuals. The fact that no Wahlund effect was identified allowed us to accurately measure the basic genetic parameters of this isolated population. Identifying such isolated and small populations is crucial for eradication programs and should be implemented more often.
authors.affiliation: Institut de Recherche pour le Développement, Centre International de Recherche pour l'Elevage en zones Subhumides, IRD UMR INTERTRYP IRD-CIRAD, CIRDES 01 BP 454 Bobo-Dioulasso 01, Burkina Faso. thierry.demeeus@ird.fr
authors.forename: Thierry
authors.initials: T
authors.lastname: De Meeûs
authors.forename: Sophie
authors.initials: S
authors.lastname: Ravel
authors.forename: Jean-Baptiste
authors.initials: JB
authors.lastname: Rayaisse
authors.forename: Fabrice
authors.initials: F
authors.lastname: Courtin
authors.forename: Philippe
authors.initials: P
authors.lastname: Solano
mesh_terms: D000818:Animals; D002050:Burkina Faso; D004641:Emigration and Immigration; D005260:Female; D017344:Genes, Insect; D005828:Genetics, Population; D005838:Genotype; D015810:Linkage Disequilibrium; D008297:Male; D018895:Microsatellite Repeats; D008957:Models, Genetic; D060047:Reproductive Isolation; D014370:Tsetse Flies / Q000235:genetics*