Evaluation of the response of 25 commonly cultivated wheat genotypes to Fusarium head blight disease under greenhouse conditions.

Fusarium head blight disease of wheat causes economic damage on this strategic crop. This disease reduces crop yield and quality by lowering the grain yield and pose health risks to consumers via production of fungal toxins such as nivalenol and deoxynivalenol on the seeds. In this study the reaction of 25 commonly cultivated wheat genotypes were evaluated to Fusarium head blight disease under greenhouse conditions.The genotypes were inoculated twice at the time of spike formation and flowering, and after ten days, the disease incidence and the disease severity were calculated. Analytical results of data related to disease incidence, disease severity and seed contamination rate (thousand seed weight and number of seeds per spike) in greenhouse conditions showed that there is a significant difference between genotypes regarding the mentioned characteristics. Also, Irana, Niknejad, Gahar, Morvarid and Zagros were resistant genotypes, Wa-82-9 and Akbari genotypes were semi-resistant, Chamran, Karvan, Pastor, Chamran 2, Chenab, weebile 264 and Spring BC Roushan were semi-susceptible genotypes, S-90-5, Mehregan, Sholah, Flat, Hirmand, Alvand, Darab, Sistan, Zarin and Star genotypes were sensitive and also Bazh was recognized as very sensitive genotype. With the evaluation of resistance and semi resistance genotypes designated in this study, against this disease under field conditions, it will possible to recommend these genotypes for wheat production programs in different parts of Iran.