نوع مقاله : مقاله پژوهشی
نویسندگان
1 بخش تحقیقات علوم زراعی و باغی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان اردبیل (مغان)، سازمان تحقیقات، آموزش و ترویج کشاورزی، مغان، ایران.
2 بخش تحقیقات غلات موسسه تحقیقات اصلاح و تهیه نهال و بذر، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرج، ایران.
چکیده
کلیدواژه‌ها
عنوان مقاله [English]
نویسندگان [English]
In this research, resistance response of 44 commercial Iranian wheat cultivars was determined to Septoria tritici blotch (STB) of wheat caused by Zymoseptoria tritici in adult plant stage in the Moghan station of Ardabil agricultural and natural resources research and education center during two consecutive years of 2020 and 2021 as percentage of the parameters relative height of disease progress on plants and disease severity using double digit scale of 00-99. Seedling resistance was evaluated to Z. tritici isolates collected from Moghan as percentages of necrotic leaf area as well as necrotic area bearing pycnidia under greenhouse conditions. Results of this study showed that virulence patterns of Z. tritici isolates on STB differential cultivars differs in different cropping seasons. Analysis of variance indicated a significant difference in reaction of wheat cultivars to the pathogen isolates at probability level of 1%. Cluster analysis of wheat genotypes based on the resistance components suggested three main groups of resistant, moderately resistant to moderately susceptible, and susceptible. About 20% of commercial wheat cultivars including Aran, Behrang, Shabrang, Torabi, Hana, Dena, Araz, Rakhshan and Sana displayed acceptable levels of resistance reaction in both seedling and adult plant stages. Reaction of Ehsan varied from moderately resistant to moderately susceptible depending on growth stage and experimental season, whereas rest of the studied cultivars showed a susceptible reaction in both evaluated stages. Sources of resistance identified in this research could be used in wheat breeding programs to pyramid resistance genes for creating effective resistance to septoria leaf blotch.
کلیدواژه‌ها [English]
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