Papers by gayatri khangjarakpam
Character association and path coefficient analysis among quantitative traits in China aster (Callistephus chinensis)
Current horticulture, 2015
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China aster [Callistephus chinensis (L.) Nees], belonging to the family Asteraceae, is a very pop... more China aster [Callistephus chinensis (L.) Nees], belonging to the family Asteraceae, is a very popular annual flowering plant grown throughout the world. In India, it is grown traditionally for loose flower, cut flower, vase arrangement, floral decorations, for making garlands and venis for hair decoration. It is extensively grown in Karnataka, Tamil Nadu, West Bengal and Maharashtra by marginal and small farmers. Dwarf cultivars are used as potted plants suitable for hedges and window boxes (Rao et al, 2012). The genus Callistephus has only a single species, chinensis, with diploid (2n) chromosome number 18 (Huziwara, 1954). Information on nature and magnitude of variability among traits in a germplasm is the prerequisite for improving a desired flower trait. Genotypic and phenotypic coefficient of variability are useful in detecting amount of variability present in the genotype. The main purpose of
International Journal of Current Microbiology and Applied Sciences, 2019
A field experiment was carried out to characterize the performance of new chrysanthemum genotypes... more A field experiment was carried out to characterize the performance of new chrysanthemum genotypes to identify suitability for cultivation in different purposes. The experiment was laid out in Randomized Block Design with twenty new genotypes in three replications at Horticultural Research Station, Mandouri, West Bengal during 2013-14 and 2014-15. Based on the evaluation of various vegetative and reproductive parameters, genotypes ‘Super’, ‘Sobha’, ‘Kumar’s White’, ‘Kumar’s Pink’, ‘Lalima’, ‘Jayanti’, ‘Swapna’ and ‘Antara’ were found suitable for cut flower production as the plants were tall with long flower stalk, uniform opening of flowers and longer vase life. Genotypes ‘Purna’, ‘Bloom’, ‘Rust’ and ‘Mauve’ were observed to be suitable for growing in the garden preferably due to better plant spread together with more number of flowers, synchronous flowering and comparatively longer flowering duration. The genotypes ‘Shankar’, ‘Triumph’, ‘Rani’ and ‘Rupanjali’ were found suitable fo...
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Journal of Horticultural Sciences, 2014
A field study was conducted to estimate genetic variability, heritability and genetic advance in ... more A field study was conducted to estimate genetic variability, heritability and genetic advance in 20 genotypes of China aster for 15 traits during the year 2012-13 in Randomized Complete Block Design, with three replications. Results revealed that the magnitude of phenotypic co-efficient of variation (PCV) was higher than genotypic co-efficient of variation (GCV) for all the traits studied. Narrow differences between GCV and PCV were recorded in all the characters except flowering duration, vase-life and shelf-life, indicating little environmental influence on expression of these characters. High (>20%) GCV and PCV were recorded for plant height, number of branches and leaves per plant, flower diameter, number of ray and disc florets/flower head, stalk length, and, number and weight of flowers/plant. Heritability estimates ranged from 28.30% (flowering duration) to 99.54% (flower diameter). High heritability (<60%) was observed for all the traits except flowering duration. High...
Seed setting studies in China aster [Callistephus chinensis (L.) Nees]
Progressive Agriculture, 2014
“Studies on the effect of Gibberellic acid (GA3) on growth, development, flowering, yield and quality of African Marigold (Tagetes erecta Linn.) cv. Pusa Narangi Gainda”
An experiment was carried out on African marigold cv. ‘Pusa Narangi Gainda’ to study the influenc... more An experiment was carried out on African marigold cv. ‘Pusa Narangi Gainda’ to study the influence of foliar application of Gibberellic acid (GA3) on growth, development, yield and biochemical constituents at UBKV, West Bengal. The treatments consist of ten different concentrations of GA3 with a control. GA3 treatment at 250 ppm resulted in significantly better performance in relation to plant height (87.87cm), number of branches (13.37), number of leaves (36.01), plant spread (40.92 cm), whole biomass (447.10 g), fresh shoot weight (355.69 g), fresh root weight (92.10 g), days to flower bud initiation (52.93 days), flower longevity on plants (6.67 days), duration of flowering (24.4 days), number of flowers/ plant (53.12), diameter of flowers (6.79 cm) and expected flower yield (52.28 MT/ha). The same treatment was also effective in improving biochemical constituents like leaf chlorophyll content (54.60 SPAD), protein content (1390.5 µg/g), carotenoids (370.8 mg/Kg), carbohydrate (2...
Character association and path coefficient analysis among quantitative traits in China aster (Callistephus chinensis)
Twenty genotypes of China aster [Callistephus chinensis (L.) Nees] were evaluated for 12 quantita... more Twenty genotypes of China aster [Callistephus chinensis (L.) Nees] were evaluated for 12 quantitative traits to study the character association and path coefficient analysis in a randomized complete block design with three replications during 2012–13. Analysis of variance showed significant differences among genotypes for all the characters. In correlation studies, number and weight of flowers/plant were significant and positively correlated with plant height, number of branches/plant, number of leaves/plant and flower stalk length. Path coefficient analysis was carried out using correlation coefficients to know the yield-contributing traits having true associations with flower yield/plant. In path coefficient analysis, days to 50% flowering recorded maximum positive direct effect on weight of flowers/plant, followed by flower stalk length, flowering duration, number of branches/plant, plant height and number of flowers/plant, revealing that indirect selection for these traits would...
Conventional and Non-Conventional Breeding Methods for Fusarium wilt Resistance in Commercial Flowers
Fusarium is an ubiquitous soil borne fungi comprising both pathogenic and non-pathogenic species,... more Fusarium is an ubiquitous soil borne fungi comprising both pathogenic and non-pathogenic species, is a major limiting factor in production of ornamental crops like gladiolus, carnation, chrysanthemum, gerbera, tulip, china aster, lily etc. causing characteristic wilt. Knowledge on host-pathogen interaction is a prerequisite for the sustenance of any breeding programme related to Fusarium resistance as it is responsible for novel product development, protection and utilization. With the recent upsurge of global floritrade, research efforts are focussed towards the development of disease-resistant cultivars utilizing conventional techniques like selection, introduction and hybridization and non-conventional techniques like marker assisted selection, soma clonal variation, in-vitro and genetic engineering. Hybridization and selection proved promising in developing wilt resistant cultivars of gladiolus. Gametophytic self-incompatibility is an innovative approach in carnation in this reg...
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Papers by gayatri khangjarakpam