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ARS Home » Plains Area » El Reno, Oklahoma » Oklahoma and Central Plains Agricultural Research Center » Peanut and Small Grains Research Unit » Research » Publications at this Location » Publication #387659

Research Project: Genetic Mechanisms and Improvement of Insect Resistance in Wheat, Barley, and Sorghum

Location: Peanut and Small Grains Research Unit

Title: Registration of 'USDA Fortress' winter feed barley with multiple aphid resistance

item Mornhinweg, Dolores - Do
item CARVER, BRETT - Oklahoma State University
item Springer, Timothy

Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 4/25/2022
Publication Date: 7/18/2022
Citation: Mornhinweg, D.W., Carver, B.F., Springer, T. 2022. Registration of 'USDA Fortress' winter feed barley with multiple aphid resistance. Journal of Plant Registrations. Article 20241.

Interpretive Summary: This is the registration of USDA Fortress a winter feed barley that has resistance to multiple aphids. USDA Fortress is adapted to the southern Great Plains.

Technical Abstract: ‘USDA Fortress’ (Reg. no. CV-375, PI 696161), a multiple aphid- esistant, high yielding, six-rowed, mid-season–maturing, winter feed barley (Hordeum vulgare L.) adapted to the Southern Plains, was developed and released by USDA-ARS in Stillwater, OK. USDA Fortress is highly resistant to Russian wheat aphid [RWA; Diuraphis noxia (Kurdjumov)] and greenbug [Shizaphis graminum (Rondani)], with seedling resistance to the new invasive pest, hedgehog grain aphid [HGA; Sipha maydis (Passerini)]. USDA Fortress has the pedigree ‘Post 90’ *4/R012. Recurrent parent Post 90 has Rsg1 resistance to greenbug, and R012 is an unadapted RWA- esistant germplasm line selected by USDA-ARS Stillwater from PI 10706. Post 90 and USDA Fortress rate 2 on Starks’ greenbug resistance scale of 1–9, while USDA Fortress and R012 rate a 3 on Websters Russian wheat aphid resistance scale of 1–9, where 1 is immune and 9 is dead on both scales. Over 17 location-years, in the absence of aphids, grain yield of USDA Fortress was 19 and 12% greater than ‘Thoroughbred’ and Post 90, respectively. USDA Fortress has average test weight of 60 kg hl–1 and has stable grain yield over state-wide variability in climatic conditions. USDA Fortress is the first multiple-aphid resistant barley cultivar in the United States.