Location: Hard Winter Wheat Genetics ResearchTitle: Registration of hard white winter wheat germplasms KS14U6380R5, KS16U6380R10, and KS16U6380R11 with adult plant resistance to stem rust
|Bowden, Robert - Bob|
|REINHART, KATHERINE - Syngenta|
|Seabourn, Bradford - Brad|
Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 11/21/2019
Publication Date: 4/9/2020
Citation: Guttieri, M.J., Bowden, R.L., Reinhart, K., Marshall, D.S., Jin, Y., Seabourn, B.W. 2020. Registration of hard white winter wheat germplasms KS14U6380R5, KS16U6380R10, and KS16U6380R11 with adult plant resistance to stem rust. Journal of Plant Registrations. 1-7. https://doi.org/10.1002/plr2.20004.
Interpretive Summary: North American hard winter wheat germplasm is vulnerable to infection by east African races of the devastating disease, stem rust. The east African races of stem rust have rapidly overcome resistance genes in wheat when these resistance genes are used singly. The three hard winter wheat germplasms developed by USDA-ARS capture a durable form of stem rust resistance, conferred by multiple genes, from the east African spring wheat cultivar, "Kingbird," in the background of a hard white winter wheat (KS05HW14) adapted to the central Great Plains of the United States. The three germplasms have adult plant resistance to east African races of stem rust, as well as useful resistance to leaf rust and stripe rust. However, the germplasms have unacceptable end-use quality. These germplasms will provide a useful starting place for hard winter wheat breeders working to develop stem rust-resistant varieties.
Technical Abstract: Resistance to Ug99 races of stem rust fungus Puccinia graminis f. sp. tritici is limited in winter wheat (Triticum aestivum L.) germplasm adapted to the Great Plains of the United States. Our objective was to generate regionally adapted hard winter wheat germplasm with combinations of adult plant resistance genes that are expected to provide durable resistance. KS14U6380R5 (PI 689115), KS16U6380R10 (PI 689116), and KS16U6380R11 (PI 689117) were derived from backcrosses of the hard white winter wheat germplasm, KS05HW14, to the stem rust-resistant Kenyan spring wheat cultivar, "Kingbird." KS14U6380R5, KS16U6380R11, and KS16U6380R10 were developed by pedigree selection and were initially evaluated as U6380-11-2R-0A, U6380-210-2R-0A, and U6380-148-4R-2T, respectively. The germplasms were developed by USDA-ARS and jointly released with the Kansas State University Agricultural Experiment Station. These germplasms provide parents for development of hard winter wheat cultivars with durable resistance to stem rust.