COMBINING ABILITY ANALYSIS AND GENE ACTION FOR YIELD AND ITS CONTRIBUTING TRAITS IN TOMATO (SOLANUM LYCOPERSICUM L.) UNDER NORTH WESTERN HIMALAYAN REGIONNidhish Gautam, Manish Kumar, Sandeep Kumar, Amit Vikram, R.K. Dogra and N. Bharat
Diallel analysis revealed highly significant differences among tomato genotypes for days to maturity, plant height, number of fruits per plant, fruit weight, and fruit yield per plant. Significant mean squares for general combining ability (GCA) and specific combining ability (SCA) indicated joint role of additive, nonadditive for the expression of days to maturity and fruit yield per plant. The predictability ratio of GCA/ SCA variance was found less than one for days to maturity, plant height, number of fruits per plant, fruit weight, and fruit yield per plant showing preponderance of non-additive gene effects. Among parents, UHFT-10 and Solan Lalima were found good general combiner for yield and some of the yield related traits studied. The hybrids viz. UHFT-55 x Solan Lalima, UHFT-9 x Solan Lalima and UHFT-10 x Solan Lalima had significant SCA effects for yield and were suggested for the exploitation of heterosis.
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