Abstract
Every cultivar released in Nebraska must have four characteristics: improved agronomic performance relative to existing cultivars, exceptional winterhardiness, resistance to Puccinia graminis (the causal agent of stem rust), and acceptable end-use quality. This paper will discuss our strategy for breeding cultivars with acceptable end-use quality. All experimental lines are derived from crosses with at least one or more parents with acceptable end-use quality. As soon as individual lines are identified (F5) generation, microquality analyses are conducted and approximately 10% are discarded on the basis of poor end-use quality. In the F6 and later generations, samples are composited from three or more locations/year, milled on a Buhler Mill, and baked using 100 g of flour per loaf. Though genotype-by-environmental interactions are large for end-use quality traits, composite samples are satisfactory for determining the end-use quality when repeated over time. By using phenotypic selection, the program has released cultivars with acceptable quality involving known “poor” quality genes and chromosomes, such as high-molecular weight (HMW) glutenin subunits 2+12 (Scout 66 and Lancota), 1BL.1RS (heterogeneous in Rawhide and homogeneous in Cougar), and 1AL.1RS (heterogeneous in Nekota and Niobrara). Phenotypic selection is preferred to genotypic selection.
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© 2001 Springer Science+Business Media Dordrecht
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Baenziger, P.S., Shelton, D.R., Shipman, M.J., Graybosch, R.A. (2001). Breeding for End-Use Quality: Reflections on the Nebraska Experience. In: Bedö, Z., Láng, L. (eds) Wheat in a Global Environment. Developments in Plant Breeding, vol 9. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-3674-9_31
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DOI: https://doi.org/10.1007/978-94-017-3674-9_31
Publisher Name: Springer, Dordrecht
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