[en] The performance of five newly evolved promising wheat (Triticum aestivum L.) mutants of variety Lu-26. i.e. WM-89-1, WM-56-1-2, WM-6-17, WM-81-2 and WM-120-3 along with the standard commercial cultivar (Pak-81), was studied under combined levels of 0-0, 95-35, 115-45-, 135-55, 155-65, 175-75 and 195-85 kilogram per hacter of N-P, during 1984-85. Days to heading, plant height, lodging and grain yield of all the mutants significantly increased (P<0.05) with increasing levels of N and P. However, high doses of fertilizer had no significant effect on spike length and spike-lets per spike. The highest grain yield was recorded in almost all mutants by the combined application of N(135 kilogram per hacter) and P(55 kilogram per hacter) as P2O5. Mutants WM-89-1 outyielded all mutants and the standard variety at 5032 kilogram per hacter was followed by the mutant WM-81-2, which also showed a high level of resistance to lodging under all levels of N and P fertilization. (author)