2006 Annual Report 4d.Progress report. This report serves to document research conducted under a reimbursable agreement between ARS and NRI-CGP, CSREES. The objectives were in support of the long-term goal of the parent CRIS, 5348-21220-003-00D, Identification and Deployment of Genes to Reduce Production Risks and Improve Quality in Club and Soft White Winter Wheat. Identified and characterized the seed dormancy and germination of wheat mutants with altered sensitivity to the plant hormone ABA. These mutants were isolated in an effort to understand the hormonal control of seed dormancy and drought tolerance. Lack of seed dormancy results in preharvest sprouting which severly damages wheat quality and drought results in yield loss. Wheat mutants showing increased sensitivity to ABA were examined to see if they have increased seed dormancy in Dr. Steber's laboratory. These mutants may be used to increase resistance to preharvest sprouting in wheat.