Genetic variability studies in Indigo (Indigofera tinctoria L.)
Dhanasekaran, D. | Sekar, K.
An experiment to estimate the extent of variability, heritability and genetic advance as percent of mean on twenty accessions of Indigofera tinctoria collected from diverse geographical locations and raised in the Orchard unit of the Department of Horticulture, Faculty of Agriculture, Annamalai University. The experiment was laid out in a randomized block design with three replications. The biometric observations of plant height, plant spread, the number of branches, the number of leaves, leaf area, biomass, fresh weight of shoots, fresh weight of leaves, glucoside content, indigo content dye yield and dye recovery were recorded at 160 days after sowing. High GCV estimates were recorded for dye yield, leaf area, dye recovery, glucoside content, the number of branches, the number of leaves, indigo content, plant height, fresh weight of leaves and fresh weight of shoot. The high heritability estimate for the glucoside content (82.02%) revealed the possibility of increasing the glucoside content. The character dye yield was positively and significantly correlated with plant height, plant spread, the number of branches, the number of leaves, leaf area, fresh weight of leaves, fresh weight of shoot, biomass, glucoside content, dye recovery and indigo content both at genotypic as well as phenotypic levels.
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