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Adaptation of Elite Temperate and Tropical Germplasm We utilize early x late elite crosses, stratified mass selection, and modifications of the backcross technique. EarlyGEM
Original GEM (2000) Adapted GEM (2006) We have defined ‘EarlyGEM’ as the long-term and continuous effort to incorporate GEM (USDA-Germplasm Enhancement Maize Project) elite germplasm into the U.S. northern Corn Belt. The general objective is to determine the suitability of 25% GEM backcross lines for use as grain hybrids in the northern Corn Belt. Parent project, 4296-5050-1510 ‘EarlyGEM: Incorporating GEM Elite Lines in Early Maize’, has determined the usefulness of GEM material in the northern Corn Belt. Late-temperate and tropical derived maize germplasm are already adapted to ND based on the efforts involved in this project since 2000. We have produced thousands of BC1:S1 lines with ND2000 as the recurrent parent. This is the first research devoted to germplasm enhancement with tropical material in the northern Corn Belt. Results from Stratified Mass Selection for Earliness (22,500 individuals, 400 selected)
Adaptation of Elite Exotic Germplasm Sources to ND (Days to Silk) |
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