ОЦЕНКА КАЧЕСТВА ЗЕРНА СОРТОВ ЯРОВОЙ ПШЕНИЦЫ С ФИОЛЕТОВОЙ ОКРАСКОЙ ЗЕРНА В УСЛОВИЯХ ЦРНЗ

Abstract

The article presents the results of the study of the baking qualities of grain of three varieties of soft spring wheat characterized by by purple grain colouring, and the red grain standard of Zlata in the conditions of the Central region of the Non-Chernozem zone. The years of the study were characterized by contrasting meteorological conditions – excessively humid year 2020 and arid year 2021. Protein content was determined using a spectrophotometer. Gluten was washed manually. Bread baking was carried out according to the modified methodology of the State Commission for Testing and Protection of Breeding Achievements. The allelic composition of high molecular weight glutenins was carried out by electrophoresis according to Singh et al., (1991) in the modification of Branlard et al. (2001). It has been found that all varieties of spring wheat with purple grain colouring are not inferior in quality to the standard, differing from it by two alleles of high-molecular glutenins, affecting the stability of manifestation of baking qualities by year. The quality of the grain is highly dependent on the meteorological conditions of the growing season. All the studied varieties of spring wheat with a purple grain colouring are able to form a grain suitable for baking in the conditions of the Non-Chernozem zone. The quantitative protein and crude gluten content in grain varies by year, but is not inferior to the standard. The quality of gluten varied within groups I and II. At the same time, the gluten was stronger under drought conditions. All varieties showed a high potential of bread volume yield – at or above the standard. The low score of the general bakery evaluation is explained by inclusions of purple bran particles, which caused a darker colouring of the crumb. The positive correlation between the volume yield of bread and the protein content was stronger in the year with reduced protein content in grain.