Vol. 15 No. 3
Quality assessment in association with yield attributes contributing improved yield in onion (Allium cepa L.)
Abstract: Twenty-three genotypes/ hybrids of onion were evaluated at 'C' block farm of Bidhan Chandra Krishi Viswavidyalaya (Agricultural University), West Bengal, India during the Rabi (winter) seasons of 2017-18 and 2018-19 with an objective of determining the relative contribution of fourteen different characters on bulb yield. The results of this experiment revealed that total bulb yield was found to be positive and significantly correlated with polar diameter, days to maturity, total sugar and phenol both at genotypic and phenotypic level. While, negative association was observed with plant height at 60 DAT (Days after transplanting), pyruvic acid, severity of purple blotch disease both at genotypic and phenotypic level. Path coefficient analysis revealed that maximum positive direct effect on yield per plot was exhibited by average weight of ten bulbs followed by number of scales per bulb, number of leaves at 60 DAT, total sugar percentage, dry matter percentage, and polar diameter. The maximum negative direct effect was exhibited by equatorial diameter followed by plant height at 60 DAT, vitamin C, severity of purple blotch disease, phenol, pyruvic acid, total soluble solids. So a breeder while conducting improvement in onion should undergo selection based on longer polar diameter, more number of days to maturity, higher total sugar percentage and phenol, high average weight of ten bulbs, more number of scales per bulb, more number of leaves at 60 DAT, high polar diameter, high total sugar and dry matter percentage.
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