The F₁-hybrids of an 8-parent diallel cross (excluding reciprocals) of spring wheat (T. aestivum L. em. Thell) were analyzed for combining ability for days to heading, spike length, number of spikes/plant, number of grains/plant, 100-kernel weight and grain yield/plant .The results indicated significant differences among the parents for general combining ability and crosses for specific combining ability for all the studied traits .The ratio Sg²_i/Ss²_ij ranged from 0.02 for number of grains/plant to 0.15 for spike length indicating that non-additive gene effects were more important than additive in the inheritance of all the studied traits The best general combiners were Sakha 69 and Gemmiza 3 cultivars for days to heading; Sakha 69 for spike length; Giza 155 and Gemmeiza 3 for number of spikes/plant; Sakha 69, Giza 155, Giza 164 and Sakha 8 for number of grains/plant; Sids 1, Gemmiza 1 and Gemmiza 3 for 100-kernel weight and Sakha 69 for grain yield/plant .The best combination for a trait cannot simply be produced by crossing the two parents of the highest GCA alone .The useful or better-parent heterosis was observed in 2 crosses for days to heading, 11 crosses for spike length, 8 crosses for number of grains/plant, 5 crosses for each of 100 kernel weight and grain yield /plant.