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ARS Home » Research » Publications at this Location » Publication #82866
Title: A NEW TECHNIQUE FOR SCREENING FOR BIRD CHERRY-OAT APHID RESISTANCE IN WHEATAND BARLEY

Author
item Baker, Cheryl
item Mirkes, Keith
item Webster, James
item Porter, David

Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 9/30/1997
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: The bird cherry-oat aphid, Rhopalosiphum padi (L.), has been shown to reduce the yield of both wheat, Triticum aestivum (L.), and barley, Hordeum vulgare (L.), yet it causes no obvious visual symptoms. This lack of obvious symptom development makes it impossible to use the standard screening test that is effective in screening for resistance to several other aphids. Therefore, a new technique was developed to identify resistance to the bird cherry-oat aphid. This technique uses transparent seed growth pouches that allow a clear view of both shoot and root development. A rapid visual comparison of infested vs. noninfested plants makes it possible to identify those genotypes that are less impacted by the aphid at the seedling stage.