ISHS Acta Horticulturae 662: VII International Symposium on Temperate Zone Fruits in the Tropics and Subtropics
STUDIES ON EVALUATION AND VARIABILITY PARAMETERS IN LOW CHILLING APPLES (MALUS X DOMESTICA BORKH.) |
| Authors: | G. Sharma, G.D. Chua, O.C. Sharma |
| Keywords: | apple, low chilling, evaluation, coefficient of variation, heritability, genetic gain |
| Abstract:
Investigations were carried out on 12 low chilling 15 years old apple cultivars, raised on seedling rootstock during 1999-2000 and 2001-2001 for 21 characters. Results obtained revealed that ‘Tropical Beauty’ was the best genotype for the character like plant height (6.60 m), plant spread (5.67 m), trunk girth (64.50 cm), tree volume (111.20 m3), leaf area (60.67 cm2), fruit set per unit shoot length (15.25%), yield per plant (15.82 kg), fruit weight (129.80 g), total sugar (8.48%) and non-reducing sugar (1.92%). Cultivar Parlin’s Beauty was the best genotype for characters like fruit breadth, reducing sugar and was recorded as promising next to ‘Tropical Beauty’ from many desirable traits. Cultivar Chahla was superior for high number of flowers per unit shoot length, shoot length, fruit length and long duration of flowering. Earliest flowering was observed in ‘Anna’. Maximum phenotypic coefficient of variability was observed for fruit yield per plant. High heritability estimates in ally with high genetic advance as per cent of mean (genetic gain) were obtained for fruit yield per plant, number of fruits per plant, tree volume, trunk girth, plant spread, titratable acidity and number of flowers per unit. High heritability and high genetic advance indicated presence of additive gene action for these traits. | |
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