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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2019, Volume : 7, Issue : 3
First page : (377) Last page : (382)
Article doi: : http://dx.doi.org/10.18782/2320-7051.7387

Genetic Variability Studies on Early Maturing Direct Seeded Rice (Oryza sativa L.) Genotypes for Yield Component Traits

Gururaja, M.¹*, Diwan, J. R.¹, Mahantashivayogayya, K.¹, Ramesha M. S.¹, Nidagundi, J. M.¹, Kisan, B.² and R. Lokesha¹

¹Department of Genetics and Plant Breeding, UAS Raichur-584104, Karnataka, India
²Department of molecular biology and Agricultural Biotechnology, UAS Raichur-584104, Karnataka, India
*Corresponding Author E-mail: gururaj928@gmail.com
Received: 24.03.2019 | Revised: 30.04.2019 | Accepted: 8.05.2019  

 ABSTRACT

The experimental material for the present investigation consisted of an about 40 early maturing direct seeded rice genotypes were evaluated in a randomized block design with two replications at Agricultural Research Station, Gangavati during Kharif 2015. The analysis of variance revealed that for treatments i.e. mean sum of squares due to genotypes showed significant differences for all characters under studied i.e. field emergence, plant height, reproductive tiller number/plant, days to 50% flowering, grain filling duration, panicle length, panicle weight, filled and unfilled grains/panicle, test weight and grain yield/plant. The higher magnitude of PCV and GCV were recorded for filled grains per panicle and unfilled grains per panicle and it was moderate for number of reproductive tillers/plant, panicle weight. PCV and GCV were low for the characters like field emergence, plant height, days to 50% flowering, grain filling duration, panicle length. High heritability coupled with high genetic advance as per cent of mean was recorded for number of reproductive tillers/plant, panicle weight, number of filled grains, number of unfilled grains indicating the major role of additive gene action. Thus, these characters may serve as an effective selection parameter during breeding programme. High heritability coupled with moderate genetic advance as per cent of mean was recorded for plant height, grain yield/plant. Moderate heritability coupled with low genetic advance as per cent of mean was recorded for days to 50% flowering, grain filling duration, panicle length shows role of non additive gene action in the inheritance of these characters.

Key words: Direct seeded rice, PCV, GCV.

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

Cite this article: Gururaja, M., Diwan, J.R., Mahantashivayogayya, K., Ramesha, M.S., Nidagundi, J.M., Kisan, B. and Lokesha, R., Genetic Variability Studies on Early Maturing Direct Seeded Rice (Oryza sativa L.) Genotypes for Yield Component Traits, Int. J. Pure App. Biosci.7(3): 377-382 (2019). doi: http://dx.doi.org/10.18782/2320-7051.7387