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Inheritance Of Cry1f Resistance In Laboratory-Selected European Corn Borer And Its Survival On Transgenic Corn Expressing The Cry1f Toxin, E. J. G. Pereira, N. P. Storer, Blair D. Siegfried

Department of Entomology: Faculty Publications

A major assumption of the high-dose/refuge strategy proposed for insect resistance management strategies for transgenic crop plants that express toxins from Bacillus thuringiensis is that resistance traits that evolve in pest species will be recessive. The inheritance of Cry1F resistance and larval survival on commercially available Cry1F corn hybrids were determined in a laboratory-selected strain of European corn borer, Ostrinia nubilalis (Hu¨ bner), displaying more than 3000-fold resistance to Cry1F. Concentration-response bioassays of reciprocal parental crosses indicated that the resistance is autosomal and recessive. Bioassays of the backcross of the F₁ generation with the selected strain were consistent with …