Start Date: Feb 06, 2013
End Date: May 19, 2013
In comparison with molecular (gene to trait, or top-down) approach, a trait to gene (bottom-up) approach will be taken for this project. Diverse (exotic and temperate) germplasm will be screened under field conditions for resistance to aflatoxin and insect pests (i.e., corn earworm, fall armyworm, maize weevil, and stink bugs). Field-proven germplasm entries will be further evaluated for key unique phenotypic traits in relation to resistance mechanisms and underlying genetics using both conventional and molecular techniques. Following rigorous field and laboratory screenings, selected germplasm will be further examined for biochemical and physiological bases that confer resistance to multiple insect pests and aflatoxin. Insect resistance mechanisms in the selected corn and pearl millet germplasm will be categorized and the biochemical and physiological processes that confer certain insect resistance will be identified. Segregating populations with resistance to aflatoxin contamination and multiple insect damage will be developed. These new populations will serve as the sources of favorable alleles for ultimately developing aflatoxin- and insect-resistant corn inbred lines with elite agronomic traits, which will improve corn production under biotic and abiotic stresses in our region.