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

Abstract

The present investigation was carried out at Vegetable
Research Center of Govind Ballabh Pant University of
Agriculture & Technology, Pantnagar, India. The
experimental material comprised of eight genotypes of tomato
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 PBT-
5, 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-2 x 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-5 x PBT-10, PBT-5 x PBT-4, PBT-13 x 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 PBT-
4, PBT-5 x PBT-4, PBT-2 x PBT-13 and PBT-13 x PBT-10.