GENETIC VARIABILITY AND CORRELATION STUDIES IN ONION

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dc.contributor.advisorRAMESH KUMAR
dc.contributor.authorYOGITA
dc.date.accessioned2021-09-23T07:30:12Z
dc.date.available2021-09-23T07:30:12Z
dc.date.issued2021-09
dc.description.abstractABSTRACT The present investigation entitled “Genetic variability and correlation studies in onion” was conducted in 30 onion genotypes, including the check cultivar Nasik Red to find out the variability, correlations, path coefficient and divergence analysis. The research was carried out at the experimental farm of the Department of Vegetable Sciences, Dr. YS Parmar University of Horticulture and Forestry, Nauni, Solan (HP) during the Rabi season of 2019-20 and 2020-21. The experiment was laid out in Randomized Complete Block Design (RCBD) in a plot of size 1.5×1.0m2 with three replications at spacing of 15×10cm. The observations were recorded for different characters viz., plant height (cm), number of leaves per plant, leaf length (cm), neck thickness (cm), polar and equatorial diameter (cm), bulb shape index, bulb skin colour, days to 50 per cent neck fall, days to harvest, dry matter (%), total soluble solids (˚B), doubles/deformed bulb (%), average bulb weight (g), bulb yield per plot (kg), bulb yield per hectare (q) and disease incidence. All the genotypes reflected a wide and significant spectrum of variability was found for all the traits studied. UHF-ONI- 13, UHF-ONI-15 and UHF-ONI-16 performed better than all other genotypes for yield and other imperative horticultural characters. High heritability along with high to moderate genetic gain was observed for doubles/deformed bulbs, leaf length, plant height, average bulb weight, bulb yield per plot and bulb yield per hectare which suggests the improvement through simple selection. Bulb yield had significant and positive correlation with average bulb weight, equatorial diameter, plant height, neck thickness, leaf length, polar diameter, number of leaves per plant, days to harvest and days to 50 per cent neck fall. Positive direct effect on bulb yield was highest for average bulb weight followed by equatorial diameter, bulb shape index, neck thickness, total soluble solids, plant height and leaf length. Based on analysis of genetic divergence, all the genotypes accommodated in 5 clusters and cluster I accommodated maximum number of genotypes (14) followed by cluster II (8), III (6), IV (1) and V (1) respectively. The genotypes from cluster III & IV can further be used in hybridization programmes and in improvement of different horticultural attributes in onion.en_US
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810176115
dc.keywordsGENETIC VARIABILITY, CORRELATION, ONION, Nasik Reden_US
dc.language.isoEnglishen_US
dc.pages82+iiien_US
dc.publisherUHF,NAUNIen_US
dc.subVegetable Scienceen_US
dc.themeGENETIC VARIABILITY, CORRELATION, ONION, Nasik Reden_US
dc.these.typeM.Scen_US
dc.titleGENETIC VARIABILITY AND CORRELATION STUDIES IN ONIONen_US
dc.typeThesisen_US
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