Study of variability in variety farm selection-1 of papaya (Carica papaya L.)
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Date
2009-06
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
The present investigation was carried out during 2007-08 at Horticultural Research Centre, Patharchatta of G.B. Pant University of Agriculture and Technology, Pantnagar. The experimental material comprised of a variety Farm Selection -1 of papaya. The objective was to study variation for different quantitative traits and the character association in the variety Farm Selection-1 of papaya. Observations were recorded on 112 fruiting plants for various characters namely height of the plant, height at first flower, days to flowering, leaf length, leaf width, pedicel length, number of nodes, girth of plant, number of fruits per plant, fruit weight, fruiting node length, fruit diameter, pulp thickness and cavity size. The coefficient of variability was highest for fruit number per plant and fruit weight so, these two traits showed higher variability in comparison to other traits. The coefficient of variability was lowest for leaf length and leaf width so, these traits showed lower variability in comparison to other traits. Wide range of mean values for all the fourteen traits showed immense variability present in the variety Farm Selection-1 which indicates that selection can be practiced for improvement of these traits. Phenotypic correlation coefficients were also calculated between fourteen pairs of traits. Economically important characters like number of fruit was positively and significantly correlated with fruiting node length, fruit weight, fruit diameter and pulp thickness. Fruit weight was positively and significantly correlated with fruiting node length, fruit diameter and pulp thickness. Fruiting node length was positively and significantly correlated with fruit diameter, pulp thickness and cavity size. Fruit diameter was positively and significantly correlated with pulp thickness and cavity size. Pulp thickness was positively and significantly correlated with cavity size and Cavity size was the trait which showed positive and significant correlations with other traits viz., pedicel length, girth of plant, fruit weight, fruiting node length, fruit diameter and pulp thickness.
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