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United States Department of Agriculture

Agricultural Research Service

Research Project: GENETIC AND GENOMIC APPROACHES TO IMPROVE INSECT RESISTANCE AND OTHER VALUE-ADDED TRAITS IN WHEAT, BARLEY, AND SORGHUM

Location: Wheat, Peanut and Other Field Crops Research

Title: Bird cherry-oat aphid resistance in barley

Authors
item MORNHINWEG, DOLORES
item SPRINGER, TIMOTHY

Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: August 1, 2012
Publication Date: October 23, 2012
Citation: Mornhinweg, D.W., Springer, T.L. 2012. Bird cherry-oat aphid resistance in barley [abstract]. ASA-CSSA-SSSA Annual Meeting Abstracts, Oct. 21-24, 2012, Cincinnati, OH, Poster No. 239-6.

Technical Abstract: Bird cherry-oat aphid, Rhopalosiphum padi L., is a serious pest of barley, Hordeum vulgare L., world-wide. It is the most efficient vector of barley yellow dwarf virus, the most important viral disease of small grains in the world. Not all bird cherry-oat aphids acquire the virus while feeding on infected plants yet yield loss has been reported with nonviruliferous bird cherry-oat aphid feeding alone. Because bird cherry-oat aphid injury is normally considered asymptomatic, screening of seedlings in the greenhouse to identify resistance has not been considered possible. A greenhouse seedling screening technique is herein proposed to identify bird cherry-oat aphid resistance in barley and a visual chlorosis rating scale of 1-5 is described. The objectives of this study were to validate this screening technique and determine if the proposed rating scale accurately predicts resistance in terms of grain yield and yield components.

Last Modified: 8/19/2014