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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2018, Volume : 6, Issue : 5
First page : (1140) Last page : (1146)
Article doi: :

Genetic Variability Studies for Yield and Yield Components in Onion (Allium cepa) Genotypes

D. Rameez Basha*, L. Mukunda Lakshmi, Syed Sadarunnisa and K. T. Venkataramana

Department of Vegetable science, College of horticulture, Anantharajupet 516105
*Corresponding Author E-mail:
Received: 5.08.2018 | Revised: 30.08.2018 | Accepted: 7.09.2018  



The present study was aimed at investigating the growth and yield contributing traits in onion in order to generate information regarding the extent of genetic variability, heritability and genetic advance. The experiment was laid under randomized block design replicated thrice at Citrus Research Station,Tirupati Dr. YSR Horticultural University, Andhra Pradesh, during 2016-17, Rabi season along with twenty nine genotypes. High degree of variation was observed for the for plant height, neck thickness, days to 50 per cent neck fall, polar bulb diameter, bulb weight, bulb yield, thrips infestation, purple blotch disease incidence and bulb splitting. The difference between phenotypic (PCV) and genotypic (GCV) coefficient of variation was found to be narrow for most of the traits except bulb shape index. The GCV ranged from 3.44 (bulb shape index) to 41.11 per cent while PCV ranged from 4.61 (total sugars) to 41.13 per cent for the various characters studied. In the present study, high genetic advance over per cent mean coupled with high heritability was observed in all characters except bulb shape index. These characters are therefore governed by additive gene effects. Selection on the basis of these characters will be more useful for the improvement of this crop towards attaining higher yield. Superior genotypes like Bhima kiran, Bhima safed, Bhima shubhra and single red exhibited high total yield.

Key words: Variability; Heritability; Genetic advance; GCV; PCV; Onion.

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Cite this article: Basha, D.R., Lakshmi, L.M., Sadarunnisa, S. and Venkataramana, K.T., Genetic Variability Studies for Yield and Yield Components in Onion (Allium cepa) Genotypes, Int. J. Pure App. Biosci.6(5): 1140-1146 (2018). doi: