Nowadays tomato is grown in most of the countries around the globe except the colder regions (Hannan et al.
2007). Tomato being a moderate nutritional crop is considered as an important source of Vitamin A and C and
minerals which are important ingredients for table purpose, sambar preparation, chutney, pickles, ketchup, soup,
juice pure etc (Sekhar et al. 2010). By the phenomenon of heterosis in 1907, many studies on the hybrid
approaches, heterosis and combining ability estimates in tomatoes started. Combining ability studies are more
reliable as they provide useful information for the selection of parents in terms of performance of the hybrids and
elucidate the nature and magnitude of various types of gene actions involved in the expression of quantitative
traits (Ahmad et al. 2009). Today, applications and effects of heterosis in a hybrid tomato in terms of viability,
better speed development of fruit, increase of yield has been identified (Hannan et al. 2007). The present
investigation was undertaken to study and generate information about hybrid vigor, combining ability which
would help to assess the prepotency of parents in hybrid combinations.