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ARS Home » Midwest Area » Madison, Wisconsin » Vegetable Crops Research » Research » Publications at this Location » Publication #297195
Title: Three potato clones incorporating combined resistances to early blight from S. palustre and late blight from S. bulbocastanum into a S. tuberosum background

Author
item MEIER, AUSTIN - University Of Wisconsin
item Jansky, Shelley
item Halterman, Dennis

Submitted to: American Journal of Potato Research
Publication Type: Germplasm Registration
Publication Acceptance Date: 1/1/2015
Publication Date: 3/20/2015
Citation: Meier, A., Jansky, S., Halterman, D. 2015. Three potato clones incorporating combined resistances to early blight from S. palustre and late blight from S. bulbocastanum into a S. tuberosum background. American Journal of Potato Research. 92(3):410-416.

Interpretive Summary: Both early blight and late blight of potatoes, caused by Alternaria solani and Phytophthora infestans respectively, have significant effects on potato yields in most potato growing regions. Typical control for these diseases includes regular fungicide applications for disease prevention and protection. It is important to note that plants with resistance to late blight will still be treated with fungicides to control early blight. A long-term goal of this research project is to minimize the economic and environmental costs associated with fungicide application through the introduction of host resistance to both these diseases into cultivated potato. We have developed potato germplasm that contains resistance to both early and late blights. This resistance is derived from wild species of potato that are not easily crossed to cultivated varieties. This germplasm will be useful to breeders interested in incorporating resistance to these important diseases.

Technical Abstract: Three individuals from a segregating population derived from a cross between +297 and K41 are being released as germplasm with resistance to both early blight, caused by Alternaria solani, and late blight, caused by Phytophthora infestans. The source of resistance to early blight from +297 is the wild species S. palustre and late blight resistance from K41 is conferred by the RB gene from S. bulbocastanum. In addition to disease resistance, this germplasm yields well in the northern potato growing region of Wisconsin. In addition to containing resistance to both early and late blights, these clones possess multiple other desirable agronomic traits, are fertile, and readily cross to several known cultivars.