Manifestation of Heterosis and Inheritance pattern in Tomato

In the present investigation 14 parental lines showing divergence in different characters were crossed to produce 23 F1 hybrids. Expression of six morphological characters namely, growth habit, leaf shape and colour, fruit shape, blossom end of fruit , color of mature fruit before turning stage and ribbing on fruit surface were studied besides this fruit weight, equatorial diameter, polar diameter of fruit, pericarp thickness, locule no. per fruit were also studied in the hybrids. Extent of manifestation of heterosis in the hybrids for different fruit characters was analysed with reference to of genetic divergence and per se performances of the parents. The situation has been examined with reference to 4 top ranking hybrids in this investigation viz., BCT-109xBCT-115, BCT-82xBCT-110, BCT-90 x BCT-110, BCT-90 x BCT-109 which manifested high heterosis for most of the fruit characters.Per se performance of the parents the high performing hybrids in terms of manifestation of heterosis for all the five characters have been emanated either from Medium x Low or Medium x High cross combination with respect to per se performance of the parents.