Varietal specificity of wheat susceptibility to seed infection in Krasnoyarsk region

The aim of the work is to study the susceptibility of Siberian spring wheat varieties (Altayskaya 70, Altayskaya 75, Krasnoyarskaya 12, Kuraginskaya 2, Novosibirskaya 15, Novosibirskaya 18, Novosibirskaya 29, Novosibirskaya 31, Novosibirskaya 41, Svirel) to a complex of phytopathogenic fungi that cause seed infection in the Krasnoyarsk Region. The studied varieties were grown on a grain (wheat) predecessor without the use of pesticides and fertilizers in the Sukhobuzimsky and Minusinsky Districts. There were no statistically significant differences in the prevalence of infection between regions. The aver-age prevalence of seed infection was 47.0 % (48.7 % in the Sukhobuzimsky District and 45.3 % in the Minusinsky District). Statistically significant (p<0.001) differences between cultivars in the prevalence of seed infection were revealed. The minimum prevalence was found in the Kuraginskaya 2 variety (29 % on average in two districts), the maximum prevalence in the Altayskaya 75 variety (66 % in the two districts on average). Seed infection was represented by phytopathogenic fungi Fusarium spp., Bipolaris sorokiniana and Alternaria spp. (respectively 41.8; 24.6 and 33.6 % of the pathogenic complex). No statistically significant differences in the prevalence of Fusarium spp. between the districts were found. In contrast with Fusarium spp., the prevalence of Bipolaris sorokiniana and Alternaria spp. statistically significantly (p<0.001) depended on the district. Average prevalence of Bipolaris sorokiniana in the Minusinsky District was 16.2 % vs 7.0 % in the Sukhobuzimsky District whereas average prevalence of Alternaria spp. in the Minusinsky District was 10.4 % vs 21.3% in the Sukhobuzimsky District. Besides of the district, taxonomic composition of the pathogenic complex statistically significantly (p<0.001) depended on the variety. The origin of the variety had a statistically significant (p<0.001) effect both on the prevalence and on the taxo-nomic composition of seed infection.