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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 5
First page : (493) Last page : (502)
Article doi: http://dx.doi.org/10.18782/2320-7051.5830

Studies on Combining Ability for Yield and Its Component Traits in Forage Sorghum

Ashok Kumar Dehinwal1*, S. K. Pahuja1, M. Shafiqurrahaman1, Anil Kumar1 and
Priyanka Sharma2
1Department of Genetics and Plant Breeding, CCSHAU, Hisar, Haryana - 125004, India
2Faculty of Agricultural Sciences, SGT University, Gurugram, Delhi-NCR, India-122505
*Corresponding Author E-mail: ashokdehinwalccshau@gmail.com
Received: 4.09.2017  |  Revised: 7.10.2017   |  Accepted: 10.10.2017  


The study envisaged assessing the general combining ability of the parents and specific combining ability of the hybrids, using line x tester mating design. Twenty four hybrids (derived from mating four testers with six lines in L x T design) along with their parents and checks ((SSG 59-3 and MFSH 4)) were evaluated at two locations with two date of sowing (Early and late sowing) during the kharif season of 2015-16. Data on five randomly taken plants from each genotype in each replication were recorded on different quantitative characters at first cut (55 days after sowing) and second cut (45 days after first cut). The ratio of σ2 GCA/σ2 SCA was less than unity for all the characters indicating preponderance of non-additive gene action (dominance and epistasis).Among female parents 9A and 14A was the best combiner for green fodder yield and 14A for dry fodder yield in more than two different environments.Among male parents, HJ 513 and G 46 were found to be the best general combiner for green fodder yield and dry fodder yield. The cross combination of 465A × HJ 513 and 9A × IS 2389 exhibited high and positive sca effects for green fodder yield as well as for dry fodder yield. This suggests the usefulness of heterosis breeding or any breeding plan which makes use of specific combining ability effects for improvement in these traits.

Key words: Forage sorghum, Combining ability, Variance and Gene action

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

Cite this article: Dehinwal, A.K., Pahuja, S.K., Shafiqurrahaman, M., Kumar, A. and Sharma, P., Studies on Combining Ability for Yield and Its Component Traits in Forage Sorghum, Int. J. Pure App. Biosci.5(5): 493-502 (2017). doi: http://dx.doi.org/10.18782/2320-7051.5830