Chimeric P450 gene confers pyrethroid resistance in the cotton bollworm: article out now

Our recent work using genetic data shows that a chimeric P450 gene-based resistance mechanism is common around the world in cotton bollworm populations, including South America.

Different versions of the gene are likely to have arisen independently in different geographic locations via selection on existing diversity. Alleles found in Brazil are also those most commonly found in Asia, suggesting a potential origin for the incursion of the bollworm (Harmigera) into the Americas.

Multiple recombination events between two cytochrome P450 loci contribute to global pyrethroid resistance in Helicoverpa armigera