Department of Plant Breeding, G. B. Pant University of Agriculture and Technology, Pantnagar, Nainital, U. P., 263 145, India
1Present address: Department of Horticulture.
2Present address: R. A. U., Dholi. Bihar. 843 121
A 10 × 10 diallel analysis was done in F1 and F2 generations to obtain data on gene action in tomato. Both additive and non-additive gene actions control the expression of days to fruit set, days to fruit maturity, plant height, nodes between two inflorescences, fruits per inflorescence, and locules per fruit. A preponderance of additive gene action over non-additive gene action was observed for primary branches per plant and nodes to first inflorescence. A preponderance of non-additive gene action over additive gene action was observed for flowers for inflorescence, total soluble solids, fruits per plant and fruit yield. Locules per fruit and equatorial perimeter of fruit had the highest values of heritability both in narrow and broad sense.
