QUALITY OF GRAINS OF COLLECTIVE SAMPLES OF SOFT WHEAT OF DIFFERENT ECOLOGICAL-GEOGRAPHICAL ORIGIN IN THE STEPPE ZONE OF THE ORENBURG REGION

In scientific work the estimation of technological parameters of grain of wheat varieties of different ecological groups is presented at cultivation in steppe of Orenburg region. Investigations of qualitative properties of grain of spring soft wheat revealed that high-grade grain forms varieties of steppe Volga, eastern and southern ecotypes. More vitreous grains are characteristic of varieties of steppe Volga and eastern ecological groups. Grain with a protein content of 14% and higher is characterized by varieties of forest-steppe West Siberian and forest-steppe eastern, steppe Volga, steppe eastern and steppe southern ecological groups. A high content of gluten (33-34%) was noted in varieties of the steppe Volga, eastern and southern ecotypes. From all studied ecotypes, a grain was obtained with quality gluten of Groups I-III. Most of the varieties of the forest-steppe West Siberian and eastern, steppe Volga, eastern and southern ecological groups in the steppe zone of the Orenburg region form 1-2 grade grains, and samples of forest North Russian and East Siberian forest ecological groups - 3-4 classes.