|Cadle-Davidson, L - CORNELL UNIVERSITY|
|Sorrells, M - CORNELL UNIVERSITY|
|Bergstrom, G - CORNELL UNIVERSITY|
Submitted to: Phytopathology
Publication Type: Abstract Only
Publication Acceptance Date: March 15, 2003
Publication Date: June 1, 2003
Citation: CADLE-DAVIDSON, L., SORRELLS, M., GRAY, S.M., BERGSTROM, G. ASSESSING RESISTANCE TO SOILBORNE VIRUSES ON SMALL GRAINS IN A FOUR-YEAR STUDY: STRATEGIES, BARRIERS, AND ANALYSIS. PHYTOPATHOLOGY. 2003. p. 33. Technical Abstract: Major gene resistance is the most effective tactic for managing Wheat spindle streak mosaic virus (WSSMV) and Wheat soilborne mosaic virus (WSBMV) on small grains. However, assessing resistance to WSSMV and WSBMV is complicated by disease gradients within field plots, the long interval between transmission in autumn to symptom expression in spring, and the statistical interaction between disease incidence and planting date for individual genotypes. Choosing the proper tools and techniques for detecting incidence depends on the mechanism of resistance and the correlation between viral titer and symptoms. In addition to describing our obstacles and strategies in resistance assessment, we describe a novel, facile statistical analysis for objectively determining relative susceptibility based on logistic regression.