Resistance to dieldrin evolution in African malaria vectors is driven by interspecific and interkaryotypic introgression

Grau-Bove, X.; Tomlinson, S.; O'Reilly, A. O.; Harding, N. J.; Miles, A.; Kwiatkowski, D.; Donnelly, M. J.; Weetman, D.; The Anopheles gambiae 1000 Genomes Consortium,

doi:10.1101/2019.12.17.879775

bioRxiv · 10.1101/2019.12.17.879775

Resistance to dieldrin evolution in African malaria vectors is driven by interspecific and interkaryotypic introgression

Grau-Bove, X.·Tomlinson, S.·O'Reilly, A. O.·Harding, N. J.·Miles, A.·Kwiatkowski, D.·Donnelly, M. J.·Weetman, D.·The Anopheles gambiae 1000 Genomes Consortium,

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Abstract

The evolution of insecticide resistance mechanisms in natural populations of Anopheles malaria vectors is a major public health concern across Africa. Using genome sequence data, we study the evolution of resistance mutations in the resistance to dieldrin locus (Rdl), a GABA receptor targeted by several insecticides, but most notably by the long-discontinued cyclodiene, dieldrin. The two Rdl resistance mutations (296G and 296S) spread across West and Central African Anopheles via two independent hard selective sweeps that included likely compensatory nearby mutations, and were followed by a rare combination of introgression across species (from A. gambiae and A. arabiensis to A. coluzzii) and across non-concordant karyotypes of the 2La chromosomal inversion. Rdl resistance evolved in the 1950s as the first known adaptation to a large-scale insecticide-based intervention, but the evolutionary lessons from this system highlight contemporary and future dangers for management strategies designed to combat development of resistance in malaria vectors.

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Grau-Bove, X., Tomlinson, S., O'Reilly, A. O., Harding, N. J., Miles, A., Kwiatkowski, D., Donnelly, M. J., Weetman, D., The Anopheles gambiae 1000 Genomes Consortium,. 2019-12-17. Resistance to dieldrin evolution in African malaria vectors is driven by interspecific and interkaryotypic introgression. https://doi.org/10.1101/2019.12.17.879775

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