Stability analysis for yield and its components in turmeric (Curcuma longa L.)
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Date
2013-10-18
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College of Horticulture and Forestry, Central Agricultural University, Pasighat
Abstract
Analysis of variance revealed significant differences among the genotypes for all the traits in all four environments and also for pooled data over the environments. High to moderate phenotypic and genotypic coefficients of variation, eritability and genetic advance as percent of mean were observed for number of leaf per plant, number of rhizome per plant, curcumin content, cured rhizome yield per plant and fresh rhizome per plant in all four environments and also for pooled data over the environments. Correlation studies revealed that fresh rhizome yield per plnat had positives and significant correlation with pseudostem height, number of tiller per plantl number of leaf per plant, leaf area, number of rhizome per plant and cured rhizome yield per plant at both genotypic and phenotypic level in all four environments and also for pooled data over the environments but negative and significant association was recognized with days to 50% sprouting, pseudostem girth dand dry recovery in most of the environments. The pooled analysis of variance revealed significance differences among the genotypes for most of the characters except pseudostem girth and number o tiller per plant. Variance due to environments was significant for most of the characters except pseudostem girth, leaf area and dry recovery. Variance due to G x E was significant for all the characters. Environment linear component was significant for most of the traits except leaf area and dry recovery, where as G x E (linear) interaction was no-significant for all the characters. The non linear component (pooled deviation) was significant for all the dtraits which indicated the performance of the genotypes is unpredictable. The stability analysis for fresh rhizome yield per plant revealed that he genotypes CHFT-30, CHFT-36, RH-50, RH-9/90 and Plnat Pitabh were stable and ideal across the environments. The genotypes CHFT-30 and Plant Pitabh were found to bse specially adapted to favourable environment for curcumin content, while the genotyopes TCP-129, RH-13/90 and Megha Turmeric-1 were suited for all environments with unpredictable performance for this trait. On the basis of mean performance of genotypes first environment (E1) i.e. 25th April 2012 date of planting was the most favourable environment for the better expression of fresh rhizome yield per plant and most of thse traits viz., pseudostem height, number of tiller per plant, number of leaf per plant, days to maturity, curcumin content and cured rhizome yield per plant.
Description
The present investigation consisting of 12 diverse genotypes of turmeric was carried out over four environments created through different planting dates with 15 days interval between each planting date starting from 25th April, 2012 to 10th June, 2012 at Vegetable Research Farm, Department of Vegetable Science, College of Horticulture and Forestry, Central Agricultural University, Pasight, Arunachal Pradesh. The experiment was laid out in Randomized Complete Block Design with three replications in a plot size of 3 x 1.0 m. The recommended spacing (30 cm x 25 cm) and package of practices were adapted uniformly to all the genotypes. Observations were recorded on five randomly tagged plants on each genotype on days to 50% sprouting, pseudostem height, pseudostem girth, number of tiller per plant number of leaf per plant, leaf area, days to maturity, number of rhizome per plant, dry recovery, curcumin content, cured rhizome yield per plant and fresh rhizome yield per plnat. The data collected over the environments were analysed statistically for phenotypic coefficient of variation (PCV), genotypic coefficient of variation (GCV), heritability (broad sense),and genetic advance as per cent of mean (GA), correlation coefficient and stability analysis.
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