1. Inbred Line Development and Hybrid Evaluation in GEM Breeding Crosses
James A. Hawk and Tecle Weldekidan
Department of Plant and Soil Sciences University of Delaware

2. Objectives
To develop inbred lines from GEM breeding crosses with good per se and testcross performance, resistance to abiotic and biotic factors, and adaptation to the Mid-Atlantic and Corn Belt regions
Evaluate testcross performance of lines derived from DKXL212:N11a

6. Conclusions and Future Outlook
Based on yield results and per se evaluations, inbred lines DE4 and DKXL212:N11a may have potential for future line development.
DE4 rated resistant for gray leaf spot and DE3 rated intermediate.
The 162 Stiff Stalk and 188 non-Stiff Stalk S2’s will be testcrossed in winter isolation blocks, and hybrid evaluations will be conducted Summer 2003.