Yielding ability and its attributes among different cultivars of wheat (Triticum aestivum L.) namely PBW-154, PBW-343 and PBW-138 were investigated under field and pot culture conditions. At harvest, the tagged mother shoots were collected and observations were recorded on yield of grains (g), number of productive tillers, number of grains per ear, 1000 grain weight (g), number of spikelet, number of grain per spikelet, total dry matter and harvest index. The data infer that the variable yield performance of a variety could be traced to specific parameter(s) e.g., PBW-343, which out-yielded to the extent of approximately 14 and 8 percents higher than PBW-138 and PBW-154 respectively, had significantly a higher number of grains per ear. The PBW-343 also had a significantly higher number of grains per spikelet as compared to other two cultivars, which plausibly, contributed it with a higher grain numbers spike-1 in long term. By restricting the experimental observations only to the mother shoots in pot cultures trials, the findings unveiled consistency in variations amongst different varieties in their yielding abilities as well and the same could be linked to grain number per mother shoot and/or grain weights. There was an insignificant difference in PBW-343 grain weight as compared to PBW-154 which of course possessed significantly higher grain weight than PBW-138. The results of the present investigation surmise that the grain yield in wheat, whether under field or pot cultures conditions, was steered by a set of components like number of tillers M-2, grain number per ear and grain weight which contribute mutually towards the total build-up of the yield. Key words: Yield components; absolute yield; harvest index; Triticum aestivum L.