Location: Cereal Disease LabTitle: Report of the 2021 uniform regional scab nursery for spring wheat parents
Submitted to: Uniform Regional Scab Nursery for Spring Wheat Parents
Publication Type: Other
Publication Acceptance Date: 1/26/2022
Publication Date: 1/26/2022
Citation: Blecha, S.M., Kolmer, J.A., Anderson, J.A. 2022. Report of the 2021 uniform regional scab nursery for spring wheat parents. Uniform Regional Scab Nursery for Spring Wheat Parents. Available: https://doi.org/scabusa.org/reports.
Interpretive Summary: Every year the USDA-ARS in St. Paul MN coordinates testing of spring wheat breeding lines from State Agricultural Experiment Stations in South Dakota, North Dakota, Minnesota and Montana for resistance to scab. In 2021, 21 entries were evaluated for scab resistance in replicated field plots at five locations in South Dakota, Minnesota, and North Dakota. The wheat breeding lines were evaluated for incidence and severity of scab as well as yield and other important agronomic characteristics. The wheat breeding lines were tested for resistance to stem rust in field plots and greenhouse tests by the USDA-ARS Cereal Disease Laboratory, and were also tested for the presence of DNA markers that are linked to agronomic traits and disease resistance genes by the USDA-ARS in Fargo ND. The scab resistance data and yield and agronomic data are presented for the individual locations. The results are communicated directly to the cooperating wheat improvement programs, which use the results to select lines with improved scab resistance for release as wheat cultivars in the northern spring wheat region of the U.S.
Technical Abstract: The Uniform Regional Scab Nursery for Spring Wheat Parents (URSN) was grown for the 26th year in 2021. Five locations (Brookings, SD, St. Paul, MN, Crookston, MN, Prosper, ND, Langdon, ND) reported results. A total of 21 entries was included in the 2021 URSN, in addition to the resistant checks 2710, BacUp, and Rollag, the susceptible checks Wheaton, Oslo, and Norm, and N10, a Norm near-isoline containing Fhb1. The entries were contributed by four university wheat breeding programs. The core set of traits evaluated at the nursery locations varied, but most included Fusarium head blight (FHB) incidence, FHB severity, and disease index. In addition, visual scabby kernel ratings (VSK/tombstone/FDK) were provided for locations. Additional agronomic trait data are presented in individual location summary tables for locations where they were measured. Adult plant and seedling stem rust reactions are also presented. Molecular marker genotypes for a set of FHB resistance QTLs and other traits are provided for entries.