Target-site resistance mutations (kdr and RDL), but not metabolic resistance, negatively impact male mating competiveness in the malaria vector Anopheles gambiae
2015/04/22 by N Platt, Nick Platt, R M Kwiatkowska +9 · 27 citations
Biochemistry, Genetics and Molecular Biology · Medicine · #Allele #Anopheles gambiae #Biology #Gene #Genetics #Heterozygote advantage #Immunology #Insect Resistance and Genetics #Malaria #Malaria Research and Control #Mating #Mosquito-borne diseases and control #Population #Zoology
paper · pdf · doi:10.1038/hdy.2015.33
openalex publication_date 2015/04/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
Abstract
The implementation of successful insecticide resistance management strategies for malaria control is currently hampered by poor understanding of the fitness cost of resistance on mosquito populations, including their mating competiveness. To fill this knowledge gap, coupled and uncoupled Anopheles gambiae s.l. males (all M form (Anopheles coluzzii)) were collected from mating swarms in Burkina Faso. This multiple insecticide resistant population exhibited high 1014F kdr(R) allele frequencies (>60%) and RDL(R) (>80%) in contrast to the Ace-1(R) allele (<6%). Kdr heterozygote males were more likely to mate than homozygote resistant (OR=2.36; P<0.001), suggesting a negative impact of kdr on An. coluzzii mating ability. Interestingly, heterozygote males were also more competitive than homozygote susceptible (OR=3.26; P=0.006), suggesting a heterozygote advantage effect. Similarly, heterozygote RDL(R)/RDL(S) were also more likely to mate than homozygote-resistant males (OR=2.58; P=0.007). Furthermore, an additive mating disadvantage was detected in male homozygotes for both kdr/RDL-resistant alleles. In contrast, no fitness difference was observed for the Ace-1 mutation. Comparative microarray-based genome-wide transcription analysis revealed that metabolic resistance did not significantly alter the mating competitiveness of male An. coluzzii mosquitoes. Indeed, no significant difference of expression levels was observed for the main metabolic resistance genes, suggesting that metabolic resistance has a limited impact on male mating competiveness. In addition, specific gene classes/GO terms associated with mating process were detected including sensory perception and peroxidase activity. The detrimental impact of insecticide resistance on mating competiveness observed here suggests that resistance management strategies such as insecticide rotation could help reverse the resistance, if implemented early.
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