The degree of root rot attack has shown a high variability in parental forms and F1 hybrids of common wheat winter. Based on the degree and orientation of the dominance (+/-) it was found that both attributes - resistance and susceptibility are both inherited by the dominant and recessive way, the response to the pathogen strongly is influenced by the parental form of the F1 hybrid. Isolation of basal fungi from common wheat strains with rotting symptoms, and their macro- and microscopic analysis, demonstrated that the Fusarium and Drechslera species recorded the highest frequency in the fungal complex of causative agents of the disease.