Development stages of selected three line Hybrid rice (Oryza sativa L.) parentals using leaf number method [manuscript]
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Date
2017
Authors
Julie Ann G. Gamit
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Abstract
The experiment was conducted at the Philippine Rice Research Institute- Central Experiment Station, Maligaya, Science City of Muñoz, Nueva ecija to determine the leaf counts of CMS, Maintainer and Restorer lines, to determine the panicle stage and to establish the leaf count of selected parent lines as baseline data for F1 seed production using leaf number method.
The genotypes were laid out in Randomized Complete Block Design with three replications. Eighteen lines used in the study, were : IR80559A, IR80559B, PR2A, PR2B, PR29A, PR29B, PR15A, PR15B, IR80156B, PR36246, PR37246, PR34142, PR35749, PR36244, PR36248, IR73012, SRT-3R and AC66-1R.
Significant differences among genotypes were observed for the leaf count of the main culm at seedling, mid-tillering, panicle initiation, emergence of flag leaves and days to flag leaf emergence, initial heading, 50% flowering maturity and plant height at 50% flowering. The leaf count at maximum tillering stage however was found not significant.
Results of the study show that none of the R-lines has exactly same leaf count with the A-line. However, the shortest difference in leaf count is observed between PR2A and PR36248-HY-2-5-1R.