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Full-Text Articles in Life Sciences
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
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 …
Resistance To Bacillus Thuringiensis In Sugarcane Borer, Diatraea Saccharalis (F.), Xiaoyi Wu
Resistance To Bacillus Thuringiensis In Sugarcane Borer, Diatraea Saccharalis (F.), Xiaoyi Wu
LSU Doctoral Dissertations
The sugarcane borer, Diatraea saccharalis (F.), is a dominant corn stack boring pest and a major target of Bacillus thuringiensis (Bt)-corn in many areas of the mid-southern region of the United States. A Cry1Ab-resistant strain of D. saccharalis, capable of survival on commercial Bt corn plants, was established using an F2 screening procedure. Larval survival of Cry1Ab-resistant, -susceptible, and -heterozygous genotypes was evaluated on five non-Bt and seven Bt field corn hybrids at two plant stages. During the vegetative stages, all seven Bt corn hybrids were highly efficacious against the three genotypes, while 8-18% of the heterozygous genotype survived on …