1a.Objectives (from AD-416)
1. To develop elite clones of creeping bentgrass, with multiple disease resistances. 2. To deliver these clones to private bentgrass breeders for use in developing new cultivars. 3. To conduct DNA marker selection experiments, testing the hypotheses that selection for DNA markers can be used to identify disease-resistant plants of creeping bentgrass. 4. To identify the genomic source of each linkage group (chromosome).
1b.Approach (from AD-416)
Maintenance of high-quality bentgrass fairways and putting greens is a stressful and expensive task, one that could be simplified by genetic resistance to diseases. Four bentgrass breeding programs will join together into a consortium with the direct objective to support the golf industry with improved clones of creeping bentgrass and creeping-colonial hybrids. Clones will be selected for resistance to dollar spot and snow mold fungi, using molecular markers identified by research partially sponsored by USGA. Elite clones with combined resistance to dollar spot and snow mold will be identified and made available to private bentgrass breeders. Clones will be released on contractual arrangements for future royalty payments to the participating institutions and USGA.
Creeping x colonial bentgrass mapping populations were evaluated for snow mold and dollar spot resistances at two locations in 2010-11. DNA marker analyses of progenies were conducted on all bentgrass crosses and QTL analyses will be conducted later in FY11. These activities relate to the development of new germplasm to support National Program 215, Component 2, Problem area 2.1: Lack of available germplasm.