Immunological assessment of varieties of cereal crops relative to the North Caucasian and Belarusian populations of the pathogen of pink snow mold

Abstract

The article presents the results of an immunological assessment of the North Caucasian (NC) and Belarusian (BL) populations of pink snow mold (pathogen Microdochium nivale (Fr.) Samuels & I.C. Hallett) of 2 triticale varieties, 3 rye varieties, 2 winter barley varieties of Belarusian selection and 11 varieties barley, 20 varieties of winter wheat of Russian selection in the seedling phase. Infectious material was selected from two geographically distant zones - the population of the fungus of the North Caucasus region of the Russian Federation (NC) and the population selected on the crops of the Republic of Belarus (BL). It was revealed that resistance to NC was shown by one variety of winter triticale Grenado with a degree of damage of 3.2 points. Winter rye varieties showed different degrees of susceptibility to both populations: Zazerskaya 3 (NC - 5.0 points, BL 8.2 - points), Forzetti (NC5.2 - points, BL 6.4 - points), Golubka (NC - 5.4 points, BL 7.2 points). High resistance to both pathogen populations was found in the winter barley variety Vivat (NC - 2.8 points, BL - 2.6 points). High resistance relative to both populations was found in winter wheat varieties: Helios (NC - 2.0 points, BL - 2.4 points), Iliad (NC - 2.0 points, BL - 2.8 points) and Soberbash (NC 2, 8 - points, BL 2.8 - points). The degree of plant damage by the Belarusian population of the pathogen of pink snow mold was higher than the North Caucasian population (Ft4.0<Ff4.5) with a moderate degree of correlation of damage by different populations (rxy=0.33), which indicates a higher aggressiveness of the pathogen common on crops grain crops of Belarus.