The influence of genetic factors on the reaction of winter wheat genotypes to the Drechslera sorokiniana (sacc.) Subram. Fungus

One of the most harmful causative agents of root rot of the wheat is the Drechslera sorokiniana fungus, which causes serious diseases in this crop - black embryo, thin stalks, black-brown spots on the leaves, a decrease in the number of productive stalks, grains in an ear, the average weight of grains. The frequency of occurrence of the pathogen on wheat in the Republic of Moldova is high, especially under wet conditions, and therefore there is a need to create resistant varieties. The purpose of the research is to identify some important genetic factors involved in the formation of the response of winter wheat to the fungus D. sorokiniana. In this regard, the main task was to establish the effect of fungus isolates on germination, root and stem growth at different wheat genotypes - lines, F₁ hybrids. The article presents the results of a study on: 1) the variability of the reaction and the contribution of wheat genotype when interacting with the used isolates; 2) the degree of domination of growth signs at wheat hybrids F₁ in optimal conditions and in the processing of grains with the culture filtrate of the fungus; 3) the influence of the parent factor on the response of wheat F₁ fusions to the pathogen. Studies were conducted at the Institute of Genetics, Physiology and Plant Protection of the Republic of Moldova. The material for the study was the lines, F₁ wheat hybrids, and culture filtrates of isolates of the fungus D. sorokiniana. Conclusion: interallell interactions and parental components of the genotype are of great importance in the reaction of wheat to the D. sorokiniana fungus.

пшеница, Drechslera sorokiniana, культуральный фильтрат, реакция, степень доминирования, эффект реципрокности, wheat, Drechslera sorokiniana, culture filtrate, reaction, degree of domination, effect of reciprocity