Simard Frédéric, Lehmann T., Lemasson Jean-Jacques, Diatta Mathurin, Fontenille Didier. (2000). Persistence of Anopheles arabiensis during the severe dry season conditions in Senegal : an indirect approach using microsatellite loci. In :
Population genetics of An. arabiensis in Senegal. Insect Molecular Biology, 9 (5), p. 467-479. ISSN 0962-1075.
Titre du document
Persistence of Anopheles arabiensis during the severe dry season conditions in Senegal : an indirect approach using microsatellite loci
Population genetics of #An. arabiensis$ in Senegal
Source
Insect Molecular Biology, 2000,
9 (5), p. 467-479 ISSN 0962-1075
Variation at nine microsatellite loci was investigated to understand how Anopheles arabiensis populations survive the dry season in the sahelian region of Senegal. Low estimates of genetic differentiation (FST equal to 0.012, RST equal to 0.009) between two populations, 250km apart, suggested extensive gene flow across this distance. Despite extreme seasonal fluctuation in abundance with dry season minima in which mosquitoes virtually disappeared, allele frequencies remained stable over time in the village of Barkedji from August 1994 to December 1997 (including four rainy seasons and three dry seasons). The effective population size (Ne) was estimated to be 601 with 95% CI (281,1592), providing strong evidence against annual bottlenecks. Differences in measures of genetic diversity and linkage disequilibrium between the dry and the rainy seasons were not detected. These results suggest that despite extreme minima in local density, An. arabiensis maintains large permanent deme spread out over large area. (Résumé d'auteur)
Plan de classement
Systématique / Morphologie [052ANOPAL01]
Descripteurs
PALUDISME ; MOUSTIQUE ; VECTEUR ; SAISON SECHE ; GENOTYPE ; VARIABILITE GENETIQUE ; POLYMORPHISME GENETIQUE ; DYNAMIQUE DE POPULATION ; ETUDE REGIONALE ; ETUDE COMPARATIVE ; MICROSATELLITE POLYMORPHIQUE
