Pharmacognosy

Journal of Pharmacognosy and Phytochemistry

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Journal of Pharmacognosy and Phytochemistry

Vol. 6, Issue 3 (2017)

Gene action and combining ability analysis for yield and yield contributing traits in rice (Oryza sativa L.) over environment

Author(s): Archana Devi, Preeti Kumari, Ranjan Dwivedi, Saket Dwivedi, OP Verma, PK Singh and DK Dwivedi
Abstract: Line × tester experiment was conducted to evaluate the performance of 54 F1 hybrids alongwith 18 parents in rice. Analysis of variance revealed highly significant differences among treatments, parents, crosses and lines × testers for number of panicle bearing tillers per plant, panicle length, spikelets per panicle, and grains per panicle, spikelets fertility, biological yield per plant, harvest index and grain yield per plant under both normal and saline conditions. Parents vs. crosses were significant for panicle bearing tillers per plant, spikelets per panicle, grains per panicle, spikelets fertility, biological yield per plant and grain yield per plant in normal condition while in saline condition for spikelets per panicle, grains per panicle, spikelets fertility, biological yield per plant and harvest index. Lines were significant for panicle length, biological yield per plant and harvest index in normal condition but in case of saline condition panicle length and grain yield per plant were found significant. Testers were non-significant for all the traits in both conditions. The estimates of variance of specific combining ability effects, ratio of variance of general combining ability to specific combining ability and degree of dominance indicated preponderance of non-additive gene effects for each trait. On over all bases, role of lines in the expression of most of the yield components was more than testers and line × tester interaction under both conditions.
Pages: 662-671  |  548 Views  10 Downloads
How to cite this article:
Archana Devi, Preeti Kumari, Ranjan Dwivedi, Saket Dwivedi, OP Verma, PK Singh and DK Dwivedi. Gene action and combining ability analysis for yield and yield contributing traits in rice (Oryza sativa L.) over environment. Journal of Pharmacognosy and Phytochemistry. 2017; 6(3): 662-671.
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