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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2018, Volume : 6, Issue : 6
First page : (1156) Last page : (1162)
Article doi: : http://dx.doi.org/10.18782/2320-7051.7279

Studies on Combining Ability for Grain Yield and Early Maturity in Rabi Sorghum

Shilpa Malaghan¹* and S. T. Kajjidoni²

¹Department of genetics and Plant breeding, UAS Dharwad-580005
²AICSIP, MARS, UAS Dharwad, (Karnataka), India
*Corresponding Author E-mail: malaghan4471@gmail.com
Received: 17.11.2018 | Revised: 21.12.2018 | Accepted: 28.12.2018  

 ABSTRACT

Combining ability for grain yield and earliness traits in rabi sorghum was studied using eleven diverse lines and eight testers in line x tester (11L x 8T) design at AICSIP, MARS, UAS, Dharwad during 2015-16 rabi. Mean sum of squares due to lines, testers and line × tester were highly significant indicating the existence of high variability for most of the characters. The estimates of general combining ability (GCA) and specific combining ability (SCA) variances indicated the presence of higher magnitude non-additive gene action for number of nodes per plant, leaf blade breadth, days to physiological maturity, grain and fodder yield per plant. Whereas additive genetic action for plant height, number of leaves per plant, leaf blade length and days to 50 % flowering. The gca and sca effects indicated that the genotypes SEVS-8, Barsi Jawar, Kodamurki local and CSV-18 were good general combiners for grain and fodder yields. Line SEVS-8 and EP-9 were most desirable general combiners for both yield and early maturity traits. While the sca effects showed that the crosses Barsi Jawar x CSV-18 (34.81), Madabhavi Local x EP-117 (54.01) and Madabhavi Local x EP-94 (-6.05) were best specific combiners for grain, fodder yield and early maturity respectively.

Key words: Combining ability, GCA variance, SCA variance, Physiological maturity 

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

Cite this article: Malaghan, S. and Kajjidoni, S.T., Studies on Combining Ability for Grain Yield and Early Maturity in Rabi Sorghum, Int. J. Pure App. Biosci.6(6): 1156-1162 (2018). doi: http://dx.doi.org/10.18782/2320-7051.7279