EVALUATION OF NEWLYEVOLVED GENOTYPES OF CARNATION(Dianthus caryophyllusL.)FOR GROWTH AND FLOWERINGPARAMETERS
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Date
2016
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UHF,NAUNI
Abstract
ABSTRACT
The present investigation entitled “Evaluation of newly evolved genotypes of carnation (Dianthus caryophyllus L.) for growth and flowering parameters” was carried out at experimental farm of Department of Floriculture and Landscape Architecture, Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan (HP) during 2014 to 2015. The experiment was laid out in RBD-Factorial with three replications and data were recorded for the first flowering flush. Ten diverse genotypes including 8 in-vitro raised, check (genotype ‘Master’) and parent (genotype ‘Tempo’) were planted on two different dates (12 February and 12 April) to evaluate these genotypes and to find out better planting time for different genotypes and to assess the extent of variability (PCV and GCV), heritability, genetic advance, genetic gain and correlation among different characters. Plant height, flower diameter, bud size, stem length, ‘A’ grade flowers, thickness of flower stem and duration of flowering were observed more in April 12 planting whereas, days taken to bud formation and flowering and flower yield were recorded more in February 12 planting. Wide and significant variations for all the parameters were observed among the different carnation genotypes. Days to bud formation and flowering, flower size and duration of flowering were recorded maximum in ‘UHFSCar-6’ while maximum plant height, length of cut flower stem and ‘A’ grade flowers was recorded in ‘Tempo’. Bud size (bud length and bud diameter), stem thickness, number of flowers per plant and per/m2 were recorded maximum in ‘UHFSCar-7’. ‘Master’ gave maximum number of petals per flower. On the basis of stem strength all the genotypes were categorized under ‘A’ grade. Maximum to moderate variability estimates in terms of GCV, PCV, heritability, genetic advance and genetic gain were observed for characters such as calyx splitting, stem strength, days for bud formation, flower yield, number of petals per flower, stem length and flowering duration indicating high genetic variability for these traits. Significant positive correlation of the desirable traits such as number of flowers, flower size, stem length, plant height, days to first flowering, number of flower per plant, duration of flowering etc., were found favourable for breeding as it helps in simultaneous improvement of correlated characters. Positive direct effect of thickness of flower stem, stem length, number of petals and calyx splitting on the number of flowers per plant revealed the true relationship between them and direct selection for these traits will be rewarding for the flower yield.
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