Abstract

Wheat (Triticum aestivum L.) breeding involves improvement of a wide range of traits. However, selection for these traits is only acceptable if the end use quality of the wheat is not compromised. In hard red spring wheat, the predominant end use of flour is bread. In this study, milling and baking quality characteristics were compared in the hard red spring wheat ‘Apogee’ and a near-isogenic line of Apogee (‘A30’) that contains a spontaneous segmental deletion of the long arm of chromosome arm 3DL that is associated with enhanced resistance to Fusarium head blight caused by the fungal pathogen Fusarium graminearum (Schwabe). Apogee and A30 were grown together in replicated greenhouse experiments, and the resultant grain was used to compare a diverse spectrum of grain characteristics and milling and baking properties of the grain in the two wheat genotypes. The major difference detected was a significant increase in protein content in A30, which had nearly 21% more flour protein than Apogee. This difference did not affect any of the flour properties or baking characteristics evaluated, suggesting that the increased protein concentrations in A30 are not associated with the principal seed storage properties associated with baking quality. These results indicate that despite the size of the deletion in A30, no key genes associated with end use quality are located on that chromosome segment. The deletion may therefore find use in efforts to enhance Fusarium head blight in hard red spring wheat.

Highlights

  • Crop improvement involves improvement of a multitude of diverse traits within a crop species

  • The objective of this study was to determine whether this deletion negatively impacts any key components of end use quality by examining its effect on a range of important kernel, milling, and baking characteristics that collectively impact end use quality

  • It was found to be highly susceptible to Fusarium head blight (FHB) caused by the fungal pathogen Fusarium graminearum (Mackintosh et al 2006) and due to its developmental properties has been proposed as a model for investigations of this disease

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Summary

Introduction

Crop improvement involves improvement of a multitude of diverse traits within a crop species. In common wheat (Triticum aestivum L.) this includes resistance or tolerance to biotic stresses including bacterial, viral, and fungal. The use of trade, firm, or corporation names in this publication is for the information and convenience of the reader. Such use does not constitute an official endorsement or approval by the United States Department of Agriculture or the Agricultural Research Service of any product or service to the exclusion of others that may be suitable. Pathogens and insect pests, and resistance/tolerance to abiotic stresses such as drought, salinity, and soil mineral toxicity and deficiency. Plant developmental and architectural traits such as vernalization response, stature, and resistance to lodging may be targets of selection (Gusta and Chen 1987; Worland and Snape 2000)

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