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Unformatted text preview: massive amounts of insecticide that have been used to protect corn from WCR, yet the latter is predicted to acquire resistance to Bt over time, according to lab tests. Also, the WCR, resistant to the protein toxin released by Bt named Cry3Bb1, will be used for the identification of genetic markers with the resistance. To control the evolution, the entomologists used non-Bt plants as refuges which maintain Bt susceptibility in the WCR population. In absence of a refuge, WCR populations developed Bt resistance quickly. The entomologists are also using DNA markers to locate the gene responsible for rotation resistance--egg-laying behavior that enables some rootworm populations to survive rotations of corn with soybean, examining genetic variation and examining gene flow within and between WCR populations....
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- Spring '08