International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 6
First page : (740) Last page : (743)
Article doi: http://dx.doi.org/10.18782/2320-7051.6044
Genetic Variability, Heritability and Genetic Advance in Onion (Allium cepa var. Cepa L.)
Pravin Kumar Sharma*, Avtar Singh, D. S. Duhan, Naval Kishor and Navjot Singh Barar
Department of Vegetable Science, Chaudhary Charan Singh Haryana Agricultural University,
Hisar (Haryana), India
*Corresponding Author E-mail: pravinveg@gmail.com
Received: 29.11.2017 | Revised: 20.12.2017 | Accepted: 23.12.2017
ABSTRACT
The present study was aimed at investigating the yield 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 Vegetable Research Farm, Department of Vegetable Science, Chaudhary Charan Singh Haryana Agricultural University, Hisar (Haryana), during 2013-14 and 2014-15 rabi season along with thirty five genotypes (8 sterile line, 3 tester and 24 hybrids). High degree of variation was observed for all the characters studied. The difference between phenotypic (PCV) and genotypic (GCV) coefficient of variation was found to be narrow for most of the traits except bulb weight and neck thickness. The GCV ranged from 1.24 (moisture content of bulb) to 28.32 per cent (number of ‘D’ grade bulb) while PCV ranged from 1.28 (moisture content of bulb) to 30.95 per cent (number of ‘D’ grade bulb) for the various characters studied. The high estimates of heritability were found for all the characters studied. Expected genetic advance over mean was observed high for the characters viz numbers of ‘D’ grade bulb, followed by numbers of ‘C’ grade bulb, numbers of ‘A’ grade bulb, marketable bulb yield, total bulb yield and number of leaves per plant, number of ‘B’ grade bulb and polar diameter of bulb. 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.
Key words: Variability; Heritability; Genetic advance; GCV; PCV
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Sharma, P.K., Singh, A., Duhan, D.S., Kishor, N. and Barar, N.S., Genetic Variability, Heritability and Genetic Advance in Onion (Allium cepa var. Cepa L.), Int. J. Pure App. Biosci.5(6): 740-743 (2017). doi: http://dx.doi.org/10.18782/2320-7051.6044
