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United States Department of Agriculture

Agricultural Research Service

Title: Effect of Time on Lesion Length and Pathogen Buildup in Pea Lines Resistant and Susceptible to Aphanomyces Root Rot

Authors
item Kraft, John
item BOGE, WILLIAM

Submitted to: Phytopathology
Publication Type: Abstract Only
Publication Acceptance Date: August 1, 1995
Publication Date: N/A

Technical Abstract: Resistance in peas to Aphanomyces euteiches has previously been measured by counting oospores in infected root tissue, disease severity ratings, and/or yield in disease nurseries. In a controlled environment, differences in rate of lesion development in resistant and susceptible pea lines is evident and repeatable. Indirect ELISA with a polyclonal antiserum, with increased specificity for oospore antigens, of tissue within the lesion revealed a positive, linear correlation (r**2 = 0.86) between lesion length and ELISA readings at 405 nm. Resistance in peas to A. euteiches appears associated with slower lesion development and pathogen buildup in pea roots and is inheritable.

Last Modified: 9/10/2014
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