EFFECTS OF SODIUM AZIDE AND GRAFTING ON SOME QUALITY TRAITS IN TOMATO (LYCOPERSICON LYCOPERSICUMMILL.)
EFFECTS OF SODIUM AZIDE AND GRAFTING ON SOME QUALITY TRAITS IN TOMATO (LYCOPERSICON LYCOPERSICUMMILL.)
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Date
2015-12
Authors
YAHAYA, AMINU
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Abstract
The effect of sodium azideinduced mutation and grafting methods on the growth and yield of three varieties of tomato was investigated with the aim of inducing variability that could be exploited in the improvement of some quality traits in Tomato plants. Three different treatments (chemical mutagenesis via sodium azide, grafting and a combination of grafting with sodium azide) were applied on to the three tomato varieties. The seeds of three varieties of tomato: Roma, UC and Localvarietieswere treated at four different concentrations of sodium azide (0.1mM, 1.0 mM, 2.0 mM and 0.0 mM as control) after which some of the mutants were grafted using tongue grafting method at seedlings stage; while the other set of the seeds were not treated with the mutagen but were grafted at seedlings stage. The result obtained revealed highly significant difference (P≤0.01) in the effects of sodium azide on germination percents, plant heights, survival rates, leaf attributes, number of fruits, fruit weight, pericarp thickness, number of seeds and pH.Significant improvement (P≤0.05) was also recorded on fruit diameter. Similarly, highly significant differences (P≤0.01) were found between the treatments in all the selected traits except on the leaf area,number of fruits, fruit weight, pericarp thickness, number of seeds and shoot dry weight where no significant differences exist. Furthermore, significant difference exists in the varietal response to the treatments except in the percentage germination and shoot dry weight. More so, significant differenceswere found in the traits between the seasons except germination percent (1 WAP), leaf and fruit number, pericarp thickness and fruit diameter. The result showed that sodium azide and grafting improve important quality traits of tomato. It was deduced that variety variety UC responds significantly to sodium azide while variety Roma responds more to grafting treatment. It was also concluded that, the mutants and grafted tomato could be grown both during the rainy and dry seasons. It was concluded that 0.1 mM concentration of Sodium Azide and grafting improve some important quality traits of tomato that could be utilized for further improvement of tomato crop.
Description
A THESIS SUBMITTED TO THE SCHOOL OF POSTGRADUATE STUDIES, AHMADU BELLO UNIVERSITY, ZARIA. IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE AWARD OF A MASTER OF EDUCATION DEGREE IN EDUCATIONAL BIOLOGY.
DEPARTMENT OF BIOLOGICAL SCIENCES,
FACULTY OF SCIENCE
AHMADU BELLO UNIVERSITY,
ZARIA, NIGERIA
Keywords
EFFECTS,, SODIUM AZIDE,, GRAFTING,, QUALITY TRAITS,, TOMATO,, (LYCOPERSICON LYCOPERSICUMMILL.),