Location: Sunflower Research
Project Number: 5442-21000-039-10
Start Date: Jul 01, 2012
End Date: Sep 30, 2015
To increase the genetic diversity of Sclerotinia resistance within the USDA breeding program, we will evaluate both the newest USDA Plant Introductions (which have not been tested for disease resistance) and seek new germplasm via exchanges with foreign public breeding programs. The evaluations will be done with artificial inoculations at multiple test sites in North Dakota and Minnesota. Once new sources of stalk rot and head rot resistance are identified, we will determine with the aid of MAS whether these contain new genes. Once resistance sources are identified, they will be crossed into either elite oilseed or confection lines. Dr. M. Boosalis, retired Plant Pathology chairman at U. Nebraska, has been producing Sclerotinia ascospores for 25+ years with a proprietary, unpublished protocol. We will work with him to test his method with several Sclerotinia isolates at four laboratories to assess the method’s general applicability.