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United States Department of Agriculture

Agricultural Research Service

Research Project: Resources for the Genetic Improvement of Potato

Location: Vegetable Crops Research Unit

Title: Developing germplasm resources to identify the genetic basis of resistance to common scab in potato

item Allen, Christina -
item Charkowski, Amy -
item Jansky, Shelley

Submitted to: American Phytopathological Society
Publication Type: Abstract Only
Publication Acceptance Date: March 21, 2014
Publication Date: N/A

Technical Abstract: Common scab, caused mainly by the soil-borne bacterium Streptomyces scabies, produces lesions on potato tubers, reducing tuber quality and profitability. Methods to manage common scab are often expensive, impractical, and can be ineffective. Therefore, creating cultivars that are resistant to common scab has been cited as the best method to control the disease. 524-8, an inbred diploid line of the wild potato species Solanum chacoense, exhibits significant and consistent resistance to common scab. , M6, a S. chacoense inbred line with high genetic similarity to 524-8, is susceptible to common scab. These two closely related lines offer a great opportunity to examine the factors that contribute to resistance or susceptibility to common scab. Recombinant inbred lines (RILs) of 524-8 x 523-3 are being created by self-pollinating successive generations of the F2 population to achieve homozygosity. The RILs will then be phenotyped and genotyped to identify the genetic regions associated with scab resistance.

Last Modified: 1/30/2015
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