Heterosis, general and specific combining abilities and correlation coefficient were estimated using 9 lines of tomato (Solanum lycopersicum L.) and 4 testers and their F₁ hybrids, bred in line x tester fashion. The present study revealed that none of the parent was best combiner for all the traits indicating differences in genetic variability for different characters among the parents.The correlation coefficients had been worked out with a view to know the relationship between different statistical parameters used in the present investigation. Correlation coefficient between per se performance and GCA effects, per se performance and SCA effects as well as per se performance and heterobeltiosis in tomato. Correlation coefficient between heterobeltiosis and SCA effect as well as standard heterosis and SCA effect in tomato analysed.