Department of Vegetable Science, N.D. University of Agriculture and Technology, Narendra Nagar, Kumarganj, Faizabad
*Present address: Department of Vegetable Science, G.B.P.U.A.T., Pantnagar - 263145, Distt. Udham Singh Nagar (U.P.)
A study of fifteen F1 hybrids of cowpea in a diallel set involving six diverse genotypes excluding reciprocals showed that non-additive genetic component contributed to the genetic expression of number of primary branches per plant, number of clusters per plant, number of seeds per pod and green pod yield per plant. Both additive and non-additive gene actions were present with predominance of additive gene action for plant height, pod length and 100-seed weight. Besides, the results indicated partial dominance with recessive genes having positive effect and predominance of non-additive gene action for days to flowering, number of clusters per plant and number of pods per plant which showed over dominance with dominant genes having positive effect. Most of the characters were controlled by atleast one group of dominant genes.
