An Africa-wide genomic evolution of insecticide resistance in the malaria vector Anopheles funestus involves selective sweeps, copy number variations, gene conversion and transposons

Autoři: Gareth D. Weedall aff001;  Jacob M. Riveron aff001;  Jack Hearn aff001;  Helen Irving aff001;  Colince Kamdem aff004;  Caroline Fouet aff004;  Bradley J. White aff005;  Charles S. Wondji aff001
Působiště autorů: Vector Biology Department, Liverpool School of Tropical Medicine (LSTM), Pembroke Place, Liverpool, United Kingdom aff001;  School of Natural Sciences and Psychology, Liverpool John Moores University, Liverpool, United Kingdom aff002;  School of Biological and Environmental Sciences, Liverpool John Moores University, Liverpool, United Kingdom aff002;  Centre for Research in Infectious Diseases (CRID), Yaoundé, Cameroon aff003;  LSTM Research Unit at CRID, Yaoundé, Cameroon aff004;  Department of Entomology, University of California, Riverside, California, United States of America aff005;  Verily Life Sciences, South San Francisco, California, United States of America aff006
Vyšlo v časopise: An Africa-wide genomic evolution of insecticide resistance in the malaria vector Anopheles funestus involves selective sweeps, copy number variations, gene conversion and transposons. PLoS Genet 16(6): e32767. doi:10.1371/journal.pgen.1008822
Kategorie: Research Article


Insecticide resistance in malaria vectors threatens to reverse recent gains in malaria control. Deciphering patterns of gene flow and resistance evolution in malaria vectors is crucial to improving control strategies and preventing malaria resurgence. A genome-wide survey of Anopheles funestus genetic diversity Africa-wide revealed evidences of a major division between southern Africa and elsewhere, associated with different population histories. Three genomic regions exhibited strong signatures of selective sweeps, each spanning major resistance loci (CYP6P9a/b, GSTe2 and CYP9K1). However, a sharp regional contrast was observed between populations correlating with gene flow barriers. Signatures of complex molecular evolution of resistance were detected with evidence of copy number variation, transposon insertion and a gene conversion between CYP6P9a/b paralog genes. Temporal analyses of samples before and after bed net scale up suggest that these genomic changes are driven by this control intervention. Multiple independent selective sweeps at the same locus in different parts of Africa suggests that local evolution of resistance in malaria vectors may be a greater threat than trans-regional spread of resistance haplotypes.

Klíčová slova:

Africa – Benin – Genetic loci – Ghana – Haplotypes – Population genetics – Sequence alignment – Uganda


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