@article{Kushal_Vanishree_Wadeyar_Kurubar_2026, title={Genetic Variability and Performance Assessment of Onion (Allium cepa L.) Genotypes for Yield and Quality Traits}, volume={11}, url={http://dx.doi.org/10.22161/ijeab.114.37}, DOI={10.22161/ijeab.114.37}, abstractNote={<jats:p>This study assessed genetic variability and performance of 50 onion (Allium cepa L.) genotypes for 18 quantitative traits during the rabi seasons of 2023-24 and 2024-25 at Dharwad, Karnataka, India. Significant genotypic variability was observed across traits, with high-performing genotypes like NHRDF Red-2 (50.6 t/ha), NHRDF Red-4 (48.5 t/ha) and Balichakra-R (47.2 t/ha) for bulb yield. High genotypic and phenotypic coefficients of variation (GCV and PCV) were recorded for bulb neck thickness (15.28%, 19.38%), bulb yield per plot (10.86%, 11.50%) leaf area (9.92%, 10.95%). Broad-sense heritability (h²_bs &gt; 80%) with high genetic advance as percent of mean (GAM &gt; 18%) was observed for bulb yield per plot (89%, 21.12%), leaf area (82%, 18.49%), leaf area index (LAI) (82%, 18.47%) and number of rings per bulb (88%, 19.86%), indicating additive gene action and selection potential. Low heritability for days to maturity (31%, 2.12%) and total soluble solids (TSS) (16%, 3.15%) suggested environmental influence. Negative heritability for number of leaves per plant (-10%, -2.53%) and premature bolting (-11%, -2.40%) indicated data anomalies or environmental dominance. These findings highlight genotypes and traits suitable for breeding high-yielding, adaptable onion varieties.</jats:p>}, number={4}, journal={International Journal of Environment, Agriculture and Biotechnology}, publisher={AI Publications}, author={Kushal and Vanishree and Wadeyar, Bangaremma and Kurubar, A. R.}, year={2026}, pages={313–324} }