University of Agricultural Sciences, Dharwad, India.
1Present address: National Research Centre for Grapes, Manjri Farm, Solapur Road, Pune 412307 (Maharashtra State).
A study was conducted on characterization of mango germplasm with 67 genotypes, on trees of 17–19 years old, maintained at the College of Agriculture, Dharwad, India. The genetic variability was observed for 40 characters, comprising tree morpho-phenology and fruit physico-chemical and quality characters. High phenotypic coefficient of variation (PCV) and genotypic coefficient of variation (GCV) were obtained for hermaphrodite flowers, panicle number, fruit number, tree volume, bearing panicles at harvest stage, pulp content per fruit, sugar, titratable acidity and ascorbic acid contents. High heritability along with high expected genetic gain was noticed for tree volume, panicle number, bearing panicle number, total and hermaphrodite flowers per panicle, fruit number, fruit volume and pulp content, which suggested that improvement in these could be brought by direct selection. High positive correlations were recorded for fruit volume with fruit weight (0.997), pulp weight with minor width (0.875), physiological loss of fruit weight with major width (0.804), leaf area with leaf breadth (0.911), fruit number with bearing panicles (0.892), but a high negative correlation recorded between earliness of panicle emergence and duration of flowering (−0.647). Significant negative correlations were also noticed between fruit number and fruit size (−0.38) and fruit number and sugar content (−0.33). Grouping of accessions based on tree size, bearing capacity, irregularity level, fruit size and shape have been presented in tabular forms, that enable to locate genotypes for desirable traits.
Mangifera indica, flowering, shoot and panicle characters, fruit characters, tree size, yield, irregularity index, genetic variability
