Ecotype evolution in Glossina palpalis subspecies, major vectors of sleeping sickness

PLoS Neglected Tropical Diseases
Thierry de MeeûsPhilippe Solano

Abstract

The role of environmental factors in driving adaptive trajectories of living organisms is still being debated. This is even more important to understand when dealing with important neglected diseases and their vectors. In this paper, we analysed genetic divergence, computed from seven microsatellite loci, of 614 tsetse flies (Glossina palpalis gambiensis and Glossina palpalis palpalis, major vectors of animal and human trypanosomes) from 28 sites of West and Central Africa. We found that the two subspecies are so divergent that they deserve the species status. Controlling for geographic and time distances that separate these samples, which have a significant effect, we found that G. p. gambiensis from different landscapes (Niayes of Senegal, savannah and coastal environments) were significantly genetically different and thus represent different ecotypes or subspecies. We also confirm that G. p. palpalis from Ivory Coast, Cameroon and DRC are strongly divergent. These results provide an opportunity to examine whether new tsetse fly ecotypes might display different behaviour, dispersal patterns, host preferences and vectorial capacities. This work also urges a revision of taxonomic status of Glossina palpalis subspecies and highl...Continue Reading

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Citations

Sep 30, 2016·Parasites & Vectors·Soumaïla PagabeleguemJérémy Bouyer
Dec 28, 2017·PLoS Neglected Tropical Diseases·Mireille Djimangali BassèneJérémy Bouyer
Apr 6, 2020·Infection, Genetics and Evolution : Journal of Molecular Epidemiology and Evolutionary Genetics in Infectious Diseases·Judith Tchouomene LabouFlobert Njiokou
Aug 31, 2020·Infection, Genetics and Evolution : Journal of Molecular Epidemiology and Evolutionary Genetics in Infectious Diseases·Sophie RavelThierry De Meeûs

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Methods Mentioned

BETA
genotyping
PCA

Software Mentioned

Phylip
Create
Convert
Mega
NJTree
R
Fstat
PCAGen

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African trypanosomiasis, also known as sleeping sickness, is an insect-borne parasitic disease of humans and other animals. It is caused by protozoa of the species Trypanosoma brucei and almost invariably progresses to death unless treated. Discover the latest research on African trypanosomiasis here.

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