Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 2/1/2004
Publication Date: 6/4/2004
Citation: Sakhanokho, H.F., Copes, W.E., Nyochembeng, L.M., Kelley, R.Y. 2004. Molecular approaches to control puccinia hemerocallidis on daylily. Meeting Abstract. Biotechnology Symposium. pp.18
Technical Abstract: Daylily (Hemerocallis spp.) is the most popular and economically important perennial monocot grown in the United States, where it essentially had no major disease and insect problems. In August 2000, daylily rust, an exotic disease caused by the fungus Puccinia hemerocallidis, was first reported in Georgia. Within three years, the disease became a serious problem in the United States, spreading to a least 30 states. The scope of the problem is still expanding because daylily is a heavily bred crop with many producers involved in generating varieties from closely related material. In a recent screening of 84 daylily cultivars at the University of Georgia, only 17% were classified as resistant to the fungus. Very little is known about the interaction of the fungus and the daylily plant, in particular at the molecular level. Knowledge of the mechanisms of host/disease interaction will lead to more robust, long term control measures. Our objective is to identify molecular determinants of plant/pathogen interaction that can be used to improve disease resistance/tolerance in daylilies through genetic improvement. Information on the background of Puccinia hemerocallidis as well as an outline of the methodology for the project will be presented.