Institution:University of Georgia
Region:Southeast (GA, FL, AL)
Project Fiscal Year:2014
Report Received Date:
Project NPB Budget:$20,000
Previous progress from this project has resulted in the development of peanut genotypes with relatively high yield and relatively low aflatoxin contamination when grown under drought and heat stress conditions. Continued breeding efforts are needed to improve the yield and grade to develop drought tolerant peanut cultivars. During this year we continued these breeding efforts and conducted numerous field tests containing breeding lines that we are evaluating to access their tolerance to drought, yield, and grade. These lines were planted in replicated studies at our field at the Gibbs Farm that has ten rain out shelters. The shelters were then used to impose heat and drought stress for the 40 days immediately prior to harvest. Plots were visually rated for drought stress, and the yield and aflatoxin contamination was measured. Breeding lines that had relatively high yield and relatively low aflatoxin were indentified.
Molecular markers are widely used in other crops to improve breeding efficiency and effectiveness. Use of molecular marker assisted selection (MAS) in peanut breeding has lagged other crops because of a lack of molecular markers for important traits. Recent advances in peanut genomic research have resulted in the development of a few markers that can be used in peanut breeding. In order for the peanut industry to reap the maximum benefits from MAS, additional markers need to be developed for important traits. This should improve the efficiency and effectiveness of all U.S. peanut breeding programs. We have been advancing several recombinant inbred lines (RIL) populations that should be segregating for numerous economically important traits. Seed for these lines were distributed to eight research groups for phenotyping. These data will then be associated with genotypic data to identify QTL (molecular markers) for these traits.