Line x tester analysis using a set of four females, ten males and their forty hybrids was carried out to esti-mate the general combining ability of parents and specific combining ability of hybrids for yield and ten other associ-ated components in rice (Oryza sativa L.) in a Randomized Block Design during Kharif 2011. GCA variances for females (s2f) were significant at 0.1% level of significance for plant height (40.8), no. of grains per panicle (505.9), grain yield per plant (29.1), test weight(17.9), straw yield per plant (61.3) and kernel L/B ratio (0.2) whereas specific combining ability (SCA) variances for f x m interactions were highly significant for all the characters. Non-additive gene action was prevalent in all characters (Range: 0.03 in amylose content to 0.88 in kernel length breadth ratio) except plant height (1.33) as evident by low GCA to SCA ratio. None of the parents were good general combiner for all traits, however, female IR-28 and male AMT-119 and PNR-546 were good general combiners for a maximum number of traits i.e. five traits out of eleven.. The general combining ability for grain yield per plant for female parent Gurjari (6.19) and NVSR-178 (5.29); and male parents AMT 119 (2.73) and PNR 546 (2.44) makes them a good choice for improving yields in a hybridization programme as these female and male parents are also having signifi-cant GCA effects for maximum number of yield associated traits i.e. four and five traits out of eleven for female and male parents respectively. A vis-à-vis comparison of top three specific combining ability crosses with their mean performance showed correlation and these crosses were having at least one good general combining ability parent.
Females, GCA effects,, Gene effect, Males, SCA effects
FAO (2014). Food and Agriculture organization [Online]. http://faostat3.fao.org/download/Q/QC/E [1st Feburay, 2016].
Hallauer, A.R., Carena, M.J. and Filho, J.B.M., 3rd eds. (2010). Quantitative Genetics in Maize Breeding, Handbook of Plant Breeding, Springer, New York. 6: 663
Juliano, B.O. (1971). A simplified assay for milled rice amylose. Cereal Sci. Today. 16 : 334-360.
Kumar, S.; Singh, H. B. and Sharma, J. K. (2007). Combining ability analysis for grain yield and other associated traits in rice. Oryza, 44 (2): 108-114
Parihar, A. and Pathak, A. R. (2008). Combining ability and heterosis for yield and component traits in rice. Indian J. Crop Sci., 3 (1) : 169-171
Patil, P. P., Vashi, R. D., Lodam, V. A., Patil, S. R. and Patil, S. S. (2012). Combining ability for yield and component characters in rice (Oryza sativa L.). Agric. Sci. Digest, 32(1): 28-32
Pradhan, S. K. and Singh, S. (2008). Combining ability and gene action analysis for morphological and quality traits in basmati rice. Oryza, 45 (3): 193-197
Prajapati, M. B. and Mistry, P. M. (2014). Line x Tester analysis in Rice (Oryza sativa L.). BIOINFOLET, 11 (2C): 677-687
Sharma, R. K. and Mani, S. C. (2008). Analysis of gene action and combining ability for yield and its component characters in rice. Oryza, 45 (2) : 94-97
Singh, N. K.; Kumar, A. and Kumar, R. (2007). Combining ability for yield and yield components in rice. Oryza, 44 (2) : 156-159
Singh R. K. and Chaudhry B.D., eds., (1985). Biometrical methods in quantitative genetic analysis, Kalyani Publisher, New Delhi, pp.205-214.
Stoskopf, N. C. (1985). Cereals grain crops. Reston. Pub.Co.Verginia: 256-278
Tyagi, J. P.; Singh, T. and Singh, V. P. (2008). Combining ability analysis in rice. Oryza, 45 (3) : 235-238
This work is licensed under Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) © Author (s)