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United States Department of Agriculture

Agricultural Research Service

Research Project: Soft Kernel Durum Wheat: Removing the Culinary Constraints of this Genetically Rich Cereal Species

Location: Wheat Health, Genetics, and Quality Research

Title: Influence of low-molecular-weight glutenin subunit haplotypes on dough rheology in elite common wheat varieties

Author
item Itria, Maria Ibba
item Kiszonas, Alecia
item Morris, Craig

Submitted to: Cereal Chemistry
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 8/18/2017
Publication Date: N/A
Citation: N/A

Interpretive Summary: In the present study, we analyzed the Low Molecular Weight-Glutenin Subunit (LMW-GS) genic profile of a set of elite hard spring, hard winter and soft spring varieties. The same varieties were also analyzed for their end-use quality and association between specific LMW-GS haplotypes and the analyzed end-use quality parameters was established. These findings suggest the possibility to refine the already existing LMW-GS molecular markers and to develop new molecular markers to more accurately control wheat end-use quality.

Technical Abstract: The low molecular weight glutenin subunits (LMW-GSs) are a class of wheat seed storage proteins. They are encoded by a multigene family located at the Glu-3 loci, and their allelic variation strongly influences wheat end-use quality. Due to ambiguities in the LMW-GS allele nomenclature and to the complexity of the Glu-3 loci organization, a clear relationship between LMW-GS alleles and wheat end-use quality parameters has not been determined. In the present study, a set of elite common wheat varieties was analyzed for their LMW-GS genic profile and their dough rheology and bread baking properties. In general, variation at the Glu-A3 locus had a major impact on the analyzed dough rheology parameters, followed by the Glu-B3 and Glu-D3 loci, in order. Also, the genes located at the linkage groups Glu-A3-3, Glu-B3-3 and Glu-D3-5 were more significantly associated to both dough strength, mixing and extensibility properties. Results obtained in this study clearly indicate that there are specific LMW-GS haplotypes that are more associated than others to variation of dough rheology parameters. These findings suggest the possibility to refine the already existing Glu-3 molecular markers and to develop new molecular markers to more accurately control wheat end-use quality.

Last Modified: 09/22/2017
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