Screening of wheat plants of “Poros-monos” x “M30” for seedlings vs adult plant resistance against powdery mildew (Erysiphe graminis DC. f. sp. tritici)

In this experiment, F2- monosomic lines of wheat from a cross between Poros-monos and M30. were screened for resistance against powdery mildew. Nine monosomic lines- 1A, 1D, 2A, 2D, 3B, 4A, 4B, 5B, 7D have shown some resistance against powdery mildew, while five monosomic lines- 2B, 3D, 4D, 5D, 6A were found susceptibile against this disease. A high range of susceptibility was observed by the chromosome 7B. The chromosomes 2B, 4D, 5A and 6A have shown a wide range of resistance both at seedling as well as in adult stage. The resistant genes at seedling stage try to maintain their power of resistance even when they enter into the adult stage.