Genetic correlations within and between isolated tsetse populations: What can we learn?

De Meeus Thierry, Ravel Sophie, Rayaissé Jean-Baptiste, Kaba Dramane, Courtin Fabrice, Bouyer Jérémy, Dayo Guiguigbaza-Kossigan, Camara Mamadou, Solano Philippe. 2014. Genetic correlations within and between isolated tsetse populations: What can we learn?. Acta Tropica, 138, suppl., S6-S11

https://doi.org/10.1016/j.actatropica.2014.03.004

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Quartile : Q2, Sujet : TROPICAL MEDICINE / Quartile : Q2, Sujet : PARASITOLOGY

Résumé : Isolated tsetse populations constitute a target for tsetse control programmes in endemic countries, since their isolation, if demonstrated, allows control without reinvasion risk from neighbouring populations. Population genetic parameters, such as the fixation index, have proven useful to assess isolation status, and should also give important information on the divergence time since isolation. We gathered results obtained from different datasets regarding several examples of putatively totally isolated tsetse populations of different tsetse species: Glossina palpalis gambiensis in Guinea, in the Niayes of Senegal, and in the sacred wood of Bama in Burkina Faso; G. tachinoides from Bitou and Pama in South-East Burkina Faso. The different levels of isolation were compared to differentiation between the two subspecies G. p. gambiensis and G. p. palpalis which both occur allopatrically along the Comoe River in Ivory Coast. We also use some historical evidence to calibrate differentiation speed and give estimates of time since separation for the different cases studied. Discrepancies mostly come from underestimate of effective population sizes, and we propose improving sampling design and genetic markers quality to circumvent such caveats.

Mots-clés Agrovoc : Glossina palpalis, Glossina tachinoides, Glossina, contrôle de maladies, génétique des populations, distance génétique, microsatellite, marqueur génétique, variation génétique

Mots-clés géographiques Agrovoc : Burkina Faso, Sénégal, Guinée, Côte d'Ivoire

Mots-clés complémentaires : Glossina palpalis gambiensis, Glossina palpalis palpalis

Classification Agris : L72 - Organismes nuisibles des animaux
L73 - Maladies des animaux

Champ stratégique Cirad : Axe 4 (2014-2018) - Santé des animaux et des plantes

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