Project Number: 1275-21000-176-03
Project Type: Specific C/A

Start Date: Mar 21, 2003
End Date: Mar 21, 2005

Objective:
To characterize the reaction of potato clones to both powdery and common scab. To determine the importance of genotype x environment interactions on the expression of resistance to powdery and common scab and to identify potato clones which have stable resistance to one or both of these pathogens.

Approach:
Breeders across the U.S. will be contacted in January and invited to submit 60 pounds of advanced selections for evaluation. Four standard cultivars will be utilized as checks: Atlantic and Ranger Russet as susceptible checks, and Russet Burbank and Superior as resistant checks. This should give a set of standards that growers across the country would be familiar with, whether they are primarily russet or round-white growers. Russet standards would be produced by USDA/ARS, Aberdeen and round-whites by USDA/ARS, Beltsville. For powdery scab, a randomized complete block with three replications of 15 hills will be planted for each clone. At harvest, each tuber will be rated for percent surface area covered with lesions and type of lesion, following the method of Goth et al.

Project Team

Haynes, Kathleen Wanner, Leslie Barbara Christ - Professor 301-504-7380

Related National Programs

Plant, Microbial & Insect Genetic Res., Genomics, & Genetic Improv. I (301)   Plant Diseases (303)