Estimation of heterosis for yield and yield related traits in tomato (Solanum lycopersicum L.) under polyhouse conditions

The present investigation was carried out at Vegetable Research Center of Govind Ballabh Pant University of Agriculture & Technology, Pantnagar, India. The experimental material comprised ofeight genotypes oftomato and from these eight genotypes, 28 crosses were evolved in a diallel mating design (excluding reciprocals) which was further evaluated in a Randomized Block Design (RBD). The genotypes were studied for fifteen yield and yield related traits. Desirable significant negative heterosis in all three cases i.e., over mid parent, better parent and standard parent were found for days to 50 per cent flowering, PBT-9 x PBT5, PBT-5 x PBT-13, PBT-5 x PBT-4 and PBT-13 x PBT-10, for number of fruits per plant PBT-5 x PBT-4, for average fruit weight PPT-2 x PBT-9, PPT-2x PBT-5, PPT-2 x PBT-2, PPT-2 x PBT-13, PPT-2 x PBT-10, PPT-2 x PBT-4, PBT-9 x PBT-5, PBT-5x PBT-10, PBT-5x PBT-4, PBT-13x PBT-10 and PBT-13 x PBT-4, for fruit yield per plant and fruit yield per hectare PCT-1 x PBT-5, PPT-2 x PBT-9, PPT-2 x PBT-2, PBT-9 x PBT4, PBT-5 x PBT-4, PBT-2 x PBT-13and PBT-13 x PBT-10.