No abstract

~ 35 ~ the diet, promoting AX depolymerization, eliminate the harmful effect of rye ingredient in fodder, and the less rye grain the diet contains, the greater the effect of enzymes is. Therefore, to improve the nutritional value of rye grain, targeted breeding for low AX content is necessary in order to provide low viscosity rye fodder in animals" stomachs. It is believed that such rye varieties will compete with triticale. Some researchers believe that molecular structures of water-soluble AX play a more important role than their amounts. After 9 selection cycles, the AEV in divergent populations from variety "Alfa" differed by 7.2 times, and in populations from variety "Moskovskaya 12"by 12.3 times. The cause for such an ambivalent response of varieties to selection could lie in background differences in levels of phenotypic dispersion of the trait selected in the original varieties. Conclusions. Intrapopulation selection of genotypes contrasting in viscosity led to a strong divergence of populations in terms grain quality traits due to correlative reactions. In this regard, multiple divergent selections based on AEV can be recommended as an efficient method of rye breeding for targeted use.