Inheritance Studies of Yield and Yield Related Traits in Bread Wheat Genotypes

Plants contribute almost 93% of food and among the crops wheat has the largest contribution ofabout 80% to the total global cereal production. Eight wheat cultivars including a land race were crossed in8×8 full diallel fashion during 2014-15 wheat growing season. In the succeeding crop season all the 56 F1 hybridsand their parents were evaluated during 2015-16 to study inheritance pattern of yield and yield relatedtraits at Peshawar-Pakistan. Data were generated on spikelets spike^-1, spike length (cm), days to heading andgrain yield plant^-1. Significant differences were present for all the studied parameters. In diallel analysis highlysignificant dominant (b) and additive (a) genetic effects were detected for all the parameters except spikeletsspike^-1. Scaling test for the adequacy of the model was complete to partially adequate for the studied parameters.Similarly, both dominant (H) and additive (D) genetic components were observed significant for thestudied characters. Moderate to high broad and narrow sense heritability was recorded for the studied traitswhich indicated the expression of additive gene effect for controlling the inheritance of these traits.