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Indian Journal of Pure & Applied Biosciences (IJPAB)
Year : 2019, Volume : 7, Issue : 6
First page : (152) Last page : (156)
Article doi: : http://dx.doi.org/10.18782/2582-2845.7889

Assessment of Genetic Variability in Onion (Allium cepa L.) Genotypes

Udachappa U. Pujar^1*, R. C. Jagadeesha², P. M. Gangadharappa³, Mukesh L. Chavan⁴, Shankarappa S.⁵ and J. Jayappa^6
1Ph.D. Scholar, Kittur Rani Channamma College of Horticulture Arabhavi
²Dean and professor, College of Horticulture, Bengaluru
³Dean and professor, College of Horticulture, Munirabad (Koppal)
⁴Professor, Crop Physiology, Technical officer,
Directorate of Education, University of Horticultural Sciences, Bagalkot
⁵Assistant professor, Department of Plant Pathology, College of Horticulture, Bengaluru
⁶Assistant professor, Department of Entomology, College of Horticulture, Bengaluru
*Corresponding Author E-mail: uupujar@gmail.com
Received: 7.11.2019  |  Revised: 9.12.2019   |  Accepted: 16.12.2019  

 ABSTRACT

Onion (Allium cepa L.) is one of the most valuable vegetable cum spice crop belongs to the family Alliaceae with chromosome number 2n= 16. The genus Allium comprises more than 750 crop species; notably onion, garlic, chives, and leek are widely distributed in the northern temperate and Alpine regions of the world. The existing knowledge about onion genetic diversity and resources is limited or one has to review periodically which helps in the efficient management of germplasm and selection of parents for crossing. Hence the present investigation was carried out with 40 onion genotypes for genetic variability which revealed that the environmental influence was very less on expression of these characters as it was evident by narrow gap between genotypic and phenotypic coefficients of variation. Genotypic and phenotypic coefficients of variation were moderate to high, for all the characters studied except for days to first flowering, days to 50 per cent flowering and TSS. Moderate to high heritability was observed for all characters and high genetic advance as per cent mean indicating that simple selection would be sufficient for these traits to bring genetic improvement.

Keywords: Heritability, Genetic Advance, Onion.

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Pujar, U.U., Jagadeesha, R.C., Gangadharappa, P.M., Chavan, M.L., Shankarappa, S., & Jayappa, J. (2019). Assessment of Genetic Variability in Onion (Allium cepa L.) Genotypes, Ind. J. Pure App. Biosci. 7(6), 152-156. doi: http://dx.doi.org/10.18782/2582-2845.7889