National Academy of Agricultural Sciences (NAAS)
|
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 investigation entitled “Genetic variability, heritability and genetic advance in rice (Oryza sativa L.) under salt affected soil” comprised of 7 lines and 3 testers recommended for sodic soil. Crosses were made in “line x tester mating design. Thus 21 crosses (F1’s) were produced during 2015. All crosses along with their 10 parents and one check (Usar Dhan-3) were evaluated in RBD with three replications during Kharif 2016. Observation were recorded for Days to 50% flowering, Plant height (cm), Flag leaf area (cm2), Panicle bearing tillers per plant, Panicle length (cm), Grains per panicle, 1000-grain weight (g), Biological yield per plant (g), Harvest-index (%) and Grain yield per plant (g). Analysis of variance that mean sum of squares due to treatments, parents and crosses had significant differences, whereas, significance of parent vs. crosses indicated the presence of heterotic effects in crosses. High value of phenotypic coefficients of variability (PCV) and genotypic coefficients of variability (GCV) was found for grain yield per plant and biological yield per plant indicating existence of wide spectrum of variability for these traits and greater opportunities for desired gain through phenotypic selection. Heritability in broad sense was observed (>75%) for majority of traits. High value of heritability in narrow sense (>30%) was recorded for all traits with genetic advance indicating preponderance of additive gene effects. Analysis of variance revealed relative contribution of line effect is higher than L × T effect for all characters and Tester effect is higher than Line effect for all traits confirming predominant role of non-additive gene action in the inheritance of all the characters studied.
Citations |
 |
 |
 |
 |
