Location: Plant Genetics Research
Project Number: 5070-21220-007-00
Start Date: Feb 10, 2011
End Date: Oct 14, 2015
For Objective 1, we will develop colonies with resistance to Cry34/35Ab1 and test the effectiveness of different refuge types to delay resistance. We will then evaluate our mCry3A-resistant colony for the heredity of this trait, whether the trait is maintained when selection is removed, and whether there are fitness costs associated with the trait. Finally, we will evaluate cross resistance in rootworm colonies selected for resistance to one rootworm product on other single and stacked trait products. For Objective 2, we will systematically screen exotic and GEM (Germplasm Enhancement of Maize) corn germplasm, identify potential sources of resistance, verify resistance, and move into adapted germplasm. In addition, we will conduct recurrent selection with the CRW17 synthetic population for resistance to western corn rootworm larval feeding damage. Finally, we will evaluate the CML333 family of the NAM (Nested Association Mapping) population for resistance to western corn rootworm larval feeding and identify Quantitative Trait Loci associated with reduced damage.