The mutagenic effect of various concentrations of sodium azide on traits of three varieties of tomato was investigated with the aim of improving the quality and quantity of the traits of economic importance. The seeds of three tomato varieties namely: Roma, UC and a Local variety were treated with (0.1mM, 1.0 mM, 2.0 mM and 0.0 mM as control) via pre seasons. The results obtained revealed highly significant difference (P various concentrations of sodium azide on the number of leaves, leaf area, number of fruits, fruit weight, pericarp thickness, number of seeds/fruit and pH of the fruit ju improvement (P≤0.05) was recorded on fruit diameter. More so, significant differences were found in the interactions of the varieties to the mutagenic treatments during the rainy season than the dry season. The interaction showed that all the mutants treated with 0.1mM concentration have the highest response in all the selected traits during rai fruit diameter. Similarly, all the 1.0mM treated mutants showed highest response during rainy season except in leaf area where highest response was found in dry season. Similar result was found in 2.0 mM treated mutants. We therefore concl azide concentration improves important quality traits of tomato more especially variety UC as it responds significantly to sodium azide and that, the mutant tomato could be grown both during the rainy and dry seasons.
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