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ARS Home » Plains Area » Manhattan, Kansas » Center for Grain and Animal Health Research » Hard Winter Wheat Genetics Research » Research » Publications at this Location » Publication #430267
Research Project: Mobilizing Genetic Resources and Technologies for Breeding Profitable, Resilient, and Nutritious Hard Winter Wheat

Location: Hard Winter Wheat Genetics Research

Title: Registration of KS20U111616R3: A hard winter wheat with improved Wheat streak mosaic virus resistance and stem rust resistance

Author
item Guttieri, Mary
item Bowden, Robert
item HALEY, R - Colorado State University
item FRITZ, ALLAN - Kansas State University
item ZHANG, GUORONG - Kansas State University
item Kaufman, Rhett

Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 7/21/2026
Publication Date: N/A
Citation: N/A

Interpretive Summary: Two mite-transmitted viruses, wheat streak mosaic virus and Triticum mosaic virus, are persistent problems for wheat production because growers have no option for control other than to plant resistant wheat varieties. These viruses can cause complete yield loss in farmer fields. The development of aggressive stem rust races in other parts of the world is a concern for U.S. producers because these races can cause severe disease on U.S. cultivars that are resistant to North American races. KS20U111616R3 is a new hard red winter wheat that addresses both of these challenges by providing highly effective resistance to both the mite-transmitted viruses and aggressive new races of stem rust. This new wheat, to be marketed as the cultivar 'Bernd,' provides a valuable option for producers of hard red winter wheat.

Technical Abstract: The U.S. Department of Agriculture-Agricultural Research Service announces the release of a hard red winter wheat (Triticum aestivum L.) germplasm, ‘KS20U111616R3’, (Reg. no. ______, PI 707944). KS20U111616R3 is released for its outstanding resistance to field populations of Wheat streak mosaic virus and Triticum mosaic virus based on field testing in Kansas. This resistance is conferred by a shortened translocation from Thinopyrum intermedium, named ‘rec213,’ conferring the virus resistance Wsm1. Marker information indicates that KS20U111616R3 also carries Cmc4, a gene for resistance to wheat curl mite (Aceria tosichella Kiefer), the vector of Wheat streak mosaic virus and Triticum mosaic virus. Plants of KS20U111616R3 have resistant seedling reactions to the ‘Ug99’ group stem rust (Puccinia graminis f. sp. tritici) races TTTTK, TTKSK, and TTKTT, as well as to the prevalent North America race, QFCS. The pedigree of KS20U111616R3 is (Wsm1-‘Overley’/’Fuller’, F2)//CO050270/3/CO050337-2, F2/4/’Byrd’, with the final cross made at Colorado State University. Plant Variety Protection has been requested for KS20U111616R3 with the cultivar name ‘Bernd.’