|Rosenthal, Sarah - UNIV OF WISC, MADISON|
|Rouse, Doug - UNIV OF WISC, MADISON|
Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: August 1, 2006
Publication Date: January 1, 2007
Citation: Rosenthal, S., Jansky, S.H., Rouse, D. 2007. Evaluation of high antioxidant clones among production sites [abstract]. American Journal of Potato Research. 84(1):114. Technical Abstract: An increasing interest in the antioxidant capacity of vegetables has led to the development of novel potato clones. However, little is known about the effect of production environment on antioxidant levels in potato. The main purpose of this study was to determine the effect of genotype and environment on antioxidant activity of potato tubers. In this study, three replications of 22 high antioxidant breeding clones (developed by C. Brown) and three controls (Yukon Gold, Russet Burbank, and Snowden) were planted in four environments: organic (no irrigation), organic (irrigation), conventional (central sands), and conventional (northern Wisconsin). Samples of freshly harvested tubers were diced into 1 cm cubes (including the peel), frozen in liquid nitrogen, and stored at -80C until analysis. In addition, tuber samples were stored at 5.6C for four months and processed similarly. The TEAC (Trolox equivalent antioxidant capacity) assay for evaluating antioxidant levels in human tissue was adapted for tuber tissue. Antioxidant activity was determined for all clones at all sites for both fresh and stored tubers. Differences were detected among clones within production sites. Effects of production sites were variable. This study will be repeated to determine whether trends related to production sites can be elucidated.