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United States Department of Agriculture

Agricultural Research Service

Title: Late Blight Test Results for A90586-11 Continue to Look Good

Authors
item Inglis, D - WSU-MT VERNON, WA
item Gundersen, B - WSU-MT VERNON, WA
item Johnson, D - WSU-PULLMAN, WA
item Porter, L - WSU-PULLMAN, WA
item BROWN, CHARLES
item Corsini, Dennis

Submitted to: Potato Progress
Publication Type: Popular Publication
Publication Acceptance Date: December 15, 2001
Publication Date: January 15, 2002
Citation: INGLIS, D., GUNDERSEN, B., JOHNSON, D., PORTER, L., BROWN, C.R., CORSINI, D.L. LATE BLIGHT TEST RESULTS FOR A90586-11 CONTINUE TO LOOK GOOD. POTATO PROGRESS. VOL 2(2):1. 2002.

Technical Abstract: The new potato clone, A90586-11, continues to be of interest to potato growers and breeders alike. Not only does it have an improved level of foliar resistance to late blight compared to other processing potatoes, its yield and specific gravity are as good or better than Russet Burbank. For the last five years, A90586-11 has shown reduced foliar disease that is approximately one-half of Russet Burbank each year. Laboratory tests in Pullman indicate lower susceptibility of A90586-11 to Phytophthora infestans compared to Russet Burbank once the tubers are placed in storage. The partial resistance that that this clone displays, as opposed to specific resistance, is a more desired type of late blight resistance because it is believed to be durable or long-lasting. For example, leaf lesions might still develop, but they are smaller, enlarge more slowly and produce fewer spores than leaf lesions on a susceptible host. The resistance mechanisms in A90586-11 are not known with certainty at this time. This clone would probably have the most use as a processor for the French fry industry. It could reduce the cost of late blight control compared to other highly susceptible processing clones like Shepody, Ranger Russet, and Russet Burbank.

Last Modified: 7/28/2014
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