ASSESSMENT OF GENETIC VARIABILITY AND DIVERSITY AMONG CUT CHRYSANTHEMUM (Dendranthema grandiflora Tzvelev.) GENOTYPES UNDER PROTECTED CULTIVATION

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Date
2023-11-15
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College of Horticulture, Mudigere, Keladi Shivappa Nayaka University of Agricultural and Horticultural Sciences, Shivamogga
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A study was undertaken on the assessment of genetic variability and diversity among cut chrysanthemum genotypes under protected cultivation in ICAR-ELP polyhouse, Department of Floriculture and Landscape Architecture, College of Horticulture, Mudigere, during 2022-23. The experiment was laid out in a Randomized Complete Block Design with three replications. The superior performance with respect to growth, flowering, quality and yield characters was recorded in the genotype Arctic Queen, Candor Pink and Champagne Orange. Analysis of variance showed highly significant differences among all the genotypes for all the characters under the study. High heritability coupled with high genetic advance as a per cent of mean was recorded for number of leaves, leaf length, leaf width, plant spread, stem girth, leaf area index, total chlorophyll content, duration of flowering, flower diameter, stalk length, number of flowers per stem, vase life, number of flower stems per m2 and number of flower stems per 1000 m2, suggesting that these traits can be improved through direct selection due to additive gene action. Based on D2 analysis, twenty genotypes of cut chrysanthemum were grouped into five clusters. Among the characters studied, number of flower stems per m2 contributed maximum (30.00 %) to the genetic diversity followed by vase life (14.74 %) and leaf area (14.60 %). Correlation studies exhibited that number of flower stems per m2 showed highly significant and positive correlation with plant spread (N-S), leaf length, leaf width, leaf area, flower diameter. Path analysis revealed that number of flower stems per m2 had a direct and positive effect on plant height, plant spread (N-S), leaf width, leaf area, number of leaves, days for bud initiation, flower diameter and vase life.
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