National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The present study, combining ability estimates were worked out through Line × Tester analysis of 32 hybrids developed by crossing eight lines with four testers to know the genetic architecture of 11 morphological traits under coastal saline condition. The present study was conducted at Plant Breeding Farm, Department of Genetic and Plant Breeding, Faculty of Agriculture, Annamalai University to estimate combining ability, gene action and proportional contribution of cross components in rice genotypes under coastal salinity. The analysis of variance of combining ability displayed variances of specific combining ability (SCA) were higher in magnitude than the corresponding general combining ability (GCA) variances for all the traits under study which indicated preponderance of non-additive gene action governing these traits. Based on per se and gca effects the parents KULLAKAR, ASHWANI and ADT 39 among the lines and among the testers, IR 36, ADT 37 and ADT 4545 were found to be the best general combiner for grain yield and its component characters. The hybrids namely, KULLAKAR × IR 36, ASHWANI × ADT 37, ADT 39 × ADT 45 and ASHWANI × ADT 45 were rated as superior crosses since they possessed high per se performance for most of the economic traits studied with earliness and short stature plant.
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