|RAMSTEIN, GUILLAUME - UNIVERSITY OF WISCONSIN|
Submitted to: Plant and Animal Genome Conference
Publication Type: Abstract Only
Publication Acceptance Date: 12/1/2014
Publication Date: 1/10/2015
Citation: Ramstein, G., Casler, M.D. 2015. Genomic selection in switchgrass [abstract]. Plant and Animal Genome Conference. Paper No. W429.
Technical Abstract: Switchgrass (Panicum virgatum) is undergoing development as a dedicated cellulosic bioenergy crop. It has been the U.S. Department of Energy's (DOE) model herbaceous species since 1992. On-farm dry-matter yield is the principal factor limiting sustainable economic production of switchgrass biomass for conversion to energy. To date, gains made in breeding switchgrass for increased biomass yield have come from three principal activities: (1) matching cultivars to their proper regions of adaptation, (2) 20 years of sustained breeding and selection with average gains of 1%/year, and (3) the use of late-flowering germplasm in northern areas to extend the growing season. Development of genomic selection models is expected to double or triple the rate of gain for biomass yield of switchgrass during the next 10 years. Multiple training populations representing different geographic regions and multiple breeding programs were developed to implement genomic selection in switchgrass. Phenotype was assessed on half-sib families grown in row plots at two locations. Genotype was assessed on maternal parents using an exome capture pipeline developed by the U.S. DOE Great Lakes Bioenergy Research Center. The exome is based on 60MB of gene space and includes approximately 2M single nucleotide polymorphisms. The paper will provide the initial report on genomic selection accuracies and expectations for accelerated rates of gain for biomass yield.