c3518cb17d976b8
نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی کارشناسی ارشد گروه زراعت و اصلاح نباتات، دانشکدۀ کشاورزی، دانشگاه ولیعصر(عج) رفسنجان، رفسنجان
2 دانشیار گروه زراعت و اصلاح نباتات، دانشکدۀ کشاورزی، دانشگاه ولیعصر(عج) رفسنجان، رفسنجان
3 استادیار گروه گیاهپزشکی، دانشکدۀ کشاورزی، دانشگاه ولیعصر(عج) رفسنجان، رفسنجان
4 استاد گروه زراعت و اصلاح نباتات، پردیس کشاورزی و منابع طبیعی کرج، تهران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Wheat take-all disease caused by the fungus Gaeumannomycs graminis var. tritici is an important diseases of wheat that damaged to root and crown. Evaluation of germplasm and identification of sources resistance is the first step for production of resistant varieties. In this study, 221 genotype of bread wheat, received from different location of Iran and other countries, were evaluated to take-all (T-41 isolate) in greenhouse conditions. The amount of root and crown pollution (disease score), biological dry weight and height of spring genotypes were measured (Due to the fact that winter genotypes verbalization's need didn’t meet, spring genotypes jointing and just in spring genotypes height had been measured). The genotypes were classified into six groups on the basis of mean scores. The groups are including; 4 genotypes were in highly resistant group (42 genotypes in resistant (0<Sc≤1), 42 in moderately resistant (1<Sc≤2), 70 genotypes in moderately sensitive (2<Sc≤3), 45 genotypes in sensitive (3<Sc≤4) and 18 genotypes in highly sensitive groups (4<Sc≤5). Analysis of variance, logistic regression and χ2 –square have showed a high genetic diversity to diseases resistance and its relationship with growth types (spring and winter) of wheat. Winter types were more resistant in response to take-all. The infected plants in compare to their control showed that this disease should stimulate the immune system of plants and consequently caused the more growth.
کلیدواژهها [English]