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United States Department of Agriculture

Agricultural Research Service

Title: Inheritance of Rwa Resistance in Barley Germplasm Line R006

item Mornhinweg, Dolores
item Porter, David
item Webster, James

Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: October 29, 1995
Publication Date: N/A

Technical Abstract: The Russian wheat aphid (RWA), Diuraphis noxia (Mordvilko), is a serious pest of malting barley grown in the intermountain regions of the western United States. All currently grown malting barley cultivars are extremely susceptible to RWA. Two genes, Dnb1 and Dnb2, were reported to control RWA resistance in barley germplasm line STARS-9301B. Genetic analysis of RWA- resistant line R006 indicated genetic diversity for RWA resistance. Crosse were made between 'Morex', a susceptible malting barley cultivar, and R006, a resistant germplasm line. Genetic analysis performed on parents, F1, reciprocal F1, F2, and BC populations as well as 300 F3 families indicated multiple gene control for RWA resistance in R006, however, involving different gene action than reported for STARS-9301B.

Last Modified: 5/5/2015
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