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: Barley germplasm resistant to both Russian wheat aphid and greenbug
Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: July 15, 2010
Publication Date: November 1, 2010
Citation: Mornhinweg, D.W., Obert, D.E., Carver, B. 2010. Barley germplasm resistant to both Russian wheat aphid and greenbug [abstract]. ASA-CSSA-SSSA Annual Meeting Abstracts, Oct. 31-Nov. 3, 2010, Long Beach, California, Poster No. 89-3.
Both Russian wheat aphid, Diuraphis noxia (Kurdjumov), and greenbug, Schizaphis graminum (Rondani) are potential pests on winter cereals grown in the southern plains. In outbreak years, both aphids can drastically reduce grain yield of susceptible cultivars. In barley, two single dominant genes, Rsg1 and Rsg2, confer resistance to the most prevalent biotypes of greenbug. Greenbug-resistant winter barley cultivars are available to growers in the southern plains. There are no RWA-resistant winter barley cultivars for the US. RWA resistance from 8 different sources was transferred by backcross breeding into Post 90, a high yielding, greenbug resistant cultivar with Rsg1 resistance. Promising lines breeding true for resistance to both aphids were evaluated for agronomics in Idaho and Oklahoma. Eight germplasm lines, STARS 1006B – STARS 1013B, with grain yield equal to or greater than the recurrent parent, Post 90, have been released. Each line carries RWA resistance from one of 8 different sources as well as Rsg1 greenbug resistance.