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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 2
First page : (142) Last page : (149)
Article doi: http://dx.doi.org/10.18782/2320-7051.2870

Behaviour of Gene Interactions in Rice under Saline Sodic Soil

Gaurav Dharwal*, O. P. Verma and G. P. Verma
Department of Genetics and Plant Breeding, Narendra Deva University of Agriculture and    Technology,
Kumarganj, Faizabad-224229, Uttar Pradesh, India
*Corresponding Author E-mail: dharwalgaurav666@gmail.com
Received: 19.04.2017  |  Revised: 29.04.2017   |  Accepted: 30.04.2017  


The analysis of variance for test of epistasis detected important role of epistasis or non-allelic interaction of majority of the traits under study. Thus, the epistatic interaction must be examined and considered while formulating the crop breeding strategy. The additive x additive (i) type of epistatic interaction was significant only for panicle bearing tillers per plant, L:B ratio, biological yield and harvest index. The ‘j+l’ type epistatic component, representing additive x dominance and dominance x dominance interaction, was significant for spikelets per panicle, filled spikelet per panicle, biological yield, days to 50% flowering, plant height, 1000-grain wt., spikelet fertility and panicle length. The estimates of fixable additive genetic variance (D) were highly significant for all the traits except harvest index, indicating thereby considerable scope of improvement in these traits by following conventional breeding procedures leading to development of pure line varieties. The non-fixable dominance variance (H) was highly significant for majority of the traits except panicle length, 1000 grain wt., L:B ratio and grain yield suggested that improvement in these traits may be greater through heterosis breeding or population improvement approach based on maintenance of high heterozygosity. In TTC analysis, the estimate of average degree of dominance suggested over dominance for 1000-grain wt., L:B ratio, biological yield, panicle bearing tillers per plant and days to 50% flowering.

Key words: Triple Test Cross, Epistasis and Non allelic interactions

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

Cite this article: Dharwal, G., Verma, O.P and Verma, G.P., Behaviour of Gene Interactions in Rice under Saline Sodic Soil, Int. J. Pure App. Biosci. 5(2): 142-149 (2017). doi: http://dx.doi.org/10.18782/2320-7051.2870