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To evaluate breeding material for grain quality parameters, express methods are needed at the early stages of breeding, which allow for the selection of high-quality genotypes. For the sake of stable yields of winter wheat, breeders have been creating ecologically plastic and drought-resistant varieties for many years that were more tolerant to sharp stresses that negatively affected grain quality. The quality indicators of winter wheat grain largely depend on the climatic features of the region and the weather conditions of the year, which complicates the solution of this problem. However, there is such a factor, the influence of which is inevitable - this is the time of spring renewal. This period may be shorter or longer, but it is characterized by the plant being in a state of stress. The time of spring renewal (early or late) of winter wheat can be qualified, according to the teachings of the prominent Canadian physiologist Hans Selye, as stress, that is, it is the body's reaction to a strong negative impact of the environment.

It is known that the vegetation of winter wheat in the same area can resume at different times with a range between the extreme possible periods of 45–70 days. The essence of the factor of the time of restoration of spring vegetation is that with too early or too late restoration of vegetation in plants, a significant deviation from the optimal growth and development rates, intensity of photosynthesis, resistance to lodging, structure, quality and size of the crop is observed. An increase in grain protein content above its biologically optimal level can occur due to the presence of extreme conditions, even if they occurred immediately after the resumption of time of spring renewal. The increase in grain protein content in this case may be a reaction of wheat plants to a relatively high average daily air temperature. The priority in determining the influence of the time of time of spring renewal on the productivity and quality of winter wheat grain belongs to V. D. Medynets. His many years of research have shown that the protein and gluten content in winter wheat grain in years with late spring vegetation recovery is higher than in years with early recovery. Of course, there are likely exceptions when other factors (drought, waterlogging) affect the formation of grain quality no less than the time of renewal of spring vegetation, but in general this pattern persists.