Location: Vegetable Crops Research Unit
Title: Verticillium Wilt Resistance Evaluation of Wisconsin Breeding Clones Author
Submitted to: Trade Journal Publication
Publication Type: Trade Journal
Publication Acceptance Date: November 11, 2008
Publication Date: December 10, 2008
Citation: Jansky, S.H. 2008. Verticillium Wilt Resistance Evaluation of Wisconsin Breeding Clones. Badger Common Tator. 12:13-15. Technical Abstract: Verticillium wilt is one of the most widespread and persistent problems encountered by potato producers. In Wisconsin, it is caused in large part by the fungal pathogen Verticillium dahliae. Soil fumigation is currently the only consistently effective control measure. However, host plant resistance offers an effective long-term disease control strategy. In this study, we evaluated Verticillium wilt resistance in 26 advanced selections from the Wisconsin potato breeding program, along with the cultivars Atlantic, Megachip, Millenium Russet, Ranger Russet, Red Norland, Russet Burbank, Superior and White Pearl. Clones with low yield loss, AUDPC scores and sap scores are likely to be resistant to VW. The most promising clones were W3743-5rus, W5716-1rus, W7012-1rus, W2324-1, Megachip, W4282-2, W2133-1, and W2253-5rus. Verticillium wilt resistance trials carried out in 2006 and 2007 also identified Megachip and W2133-1 as promising clones, based on symptom expression and stem colonization. W2324-1 has consistently had low levels of symptom expression, but stem colonization scores were high in 2006, low in 2007, and moderate in 2008. This clone may be effectively resistant against VW in most years.