Breeding efforts have focused intensively on improving grain yield and quality in wheat (Triticum aestivum L.). Content and composition of grain starch and seed storage protein (SSP) are two critical factors that determine grain yield and quality. Starch content is closely related to grain weight, while SSP content and composition directly affect the quality of flour. However, there is often a negative correlation between SSP content (quality) and starch content (grain yield).
