Heterosis and combining ability analysis in tomato [Soalnum lycopersicon (Mill.) Wettsd .] For yield and yield contributing traits

Six genetically diverse parent of tomato were crossed in diallel mating design without reciprocal to know heterosis for earliness, plant height, and branches per plant. In order of merit, the three best performing F, hybrids (LE-625 x PKM-1, LE68 x LE-812 and LE-90 x LE-68) exhibited heterosis percentage of -8.57,14.43 and 13.90, respectively for marketable fruit weight and fruit yield over the standard check, PKM-1 x LE-68, LE-68 x LE-81 2 and LE-81 2 x PKM-1 yielding 116.61% over the standard parent, these promising crosses also recorded the positive sca. The high performing crosses for important characters showed that in general these crosses involved high x high, high x medium, medium x low and high x low, general combiners. The low x low crosses giving high sca values may be due to the genetic diversity of the parents and non allelic interaction.