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GENETIC ANALYSIS FOR STRIPE RUST (Puccinia striiformis f. sp. tritici) RESISTANCE IN WHEAT
(Punjab Agricultural University, 2013) Avi Kumar
Fifty four (54) advanced lines of wheat were characterized for resistance against two pathotypes of stripe rust pathogen namely, 46S119 and 78S84 at seedling and adult plant stage. Six lines viz ; PBW 679, BWL 0813, BWL 1638, BWL 1639, BWL 1653 and BW 9129 were found to be resistant against both the pathotypes at seedling and adult plant stages. Nine lines viz ; PBW 550, PBW 682, BWL 0136, BWL 0827, BWL 0883, BWL 0892, BWL 0893, BWL 1622 and BW 9065 showed seedling resistance but were susceptible at adult plant stage against 46S119 pathotype, while against 78S84 pathotype seventeen lines namely, PBW 669, PBW 670, PBW 678, PBW 681, PBW 685, PBW 687, BWL 0883, BWL 0926, BWL 0927, BWL 0928, BWL 1619, BWL 1620, BWL 1628, BWL 1641, BWL 1642, HD 2733 and BW 9065 showed seedling resistance but at adult plant stage, these were found to be susceptible. Three lines namely, PBW 680, PBW 683 and BWL 0831 were susceptible at seedling stage but showed high adult plant resistance. Genetic basis of resistance in cultivars PBW 621 (DPW 621-50) and HD 2967 revealed that PBW 621 possesses one gene for resistance and HD 2967 contains two genes for resistance against 78S84 pathotype of stripe rust pathogen of wheat, which is depicted from F3 segregating population of the crosses (PBW 621 x WL 711, HD 2967 x WL 711 and PBW 621 x HD 2967).