Submitted to: Theoretical and Applied Genetics
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 12/8/2011
Publication Date: 12/1/2011
Citation: Carter, A.H., Garland Campbell, K.A., Kidwell, K.K. 2011. Chromosomes 3B and 4D are associated with several milling and baking quality traits in a soft white spring wheat (Triticum aestivum L.) population. Theoretical and Applied Genetics. 124(6):1079-96. Interpretive Summary: End use quality is an important factor in determining the value of wheat in the marketplace. Breeding for improved end use quality in soft wheat will be more efficient when molecular tools can be used to select for specific traits early in the breeding process, before grain is available for larger scale milling and baking trials. We identified molecular markers on wheat chromosomes 3B and 4D that are associated with milling and baking quality in a soft spring wheat population. These results will be used to improve milling and baking quality in soft wheat.
Technical Abstract: Wheat is marketed based on end-use quality characteristics and better knowledge of the underlying genetics of specific quality parameters is essential to enhance the breeding process. A set of 188 recombinant inbred lines from a ‘Louise’ by ‘Penawawa’ mapping population was grown in two crop years at two locations in the Pacific Northwest region of the United States and data were collected on 17 end-use quality traits using established quality analysis protocols. Using an established genetic linkage map, composite interval mapping was used to identify QTL associated with 16 of the 17 quality traits. QTL were found on 12 of the 21 wheat chromosomes. A large number of QTL were located on chromosomes 3B and 4D and coincided with traits for milling quality and starch functionality. Chromosome 3B contained 13 QTL, the majority of which were localized to a 36.9 cM region. Chromosome 4D contained 7 QTL, all of which were located on a 25.3 cM region of this chromosome. The majority of the alleles for superior end-use quality were associated with the cultivar Louise. The identification of these QTL for end-use quality gives key insight into the relationship and complexity of end-use quality traits. It also improves our understanding of these relationships, thereby allowing plant breeders to make valuable gains from selection for these important traits.