The investigation was conducted to assess the heterosis in respect to leaf yield and its component characters through 6 x 6 diallel mating design involving thirty hybrids and six parents in FCV tobacco during kharif 2016 at ZAHRS (Zonal Agricultural and Horticultural Research Station), College of Agriculture Shivamogga. The analysis of variance indicated significant amount of variability among genotypes for sixteen quantitative characters studied except for the characters like number of leaves per plant, reducing sugar and nicotine content. Heterosis was recorded for leaf yield and its component characters and the study on standard heterosis revealed that five hybrids viz., 6 x 1, 3 x 1, 2 x 1, 4 x 1 and 6 x 2 exhibited significant positive heterosis for cured leaf yield over best commercial check Kanchan.

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