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Evaluation of Maintainer and Restorer Lines for Yield and Yield Contributing Traits of Rice (oryza Sativa L.)

Dr. Md. Jamil hasan
Principal Scientific Officer
Hybrid rice division Bangladesh Rice Research Institute Gazipur-1701

Umma Kulsum
Scientific Officer
Hybrid Rice Division Bangladesh Rice Research Institute Gazipur-1701

Abstract/ Executive Summary:

An experiment was conducted at Bangladesh Rice Research Institute (BRRI), Gazipur during T.Aman season of 2007 with a view to evaluating seven maintainer and 30 restorer lines for yield and yield contributing characters for selecting promising maintainer and restorer lines for developing rice hybrids inour local environment. Significant variations were noticed among the parental lines for all the characters studied. The CMS lines Gan46A and BRRI9A could be used as female parents in hybrid seed production due to good yield and yield contributing characters recorded in their corresponding maintainer lines.Restorer line BR168R could offer high yield potentiality in heterosis breeding due to its superior yield contributing characters in local environment.

Keywords: Yield contributing characters, maintainer and Restorer lines, Hybrid rice

Location: BRRI HQ, Gazipur

Start Date: 00-00-2007

End Date: 00-00-2007

Program Area: Variety and Species

Commodity: Rice

Objectives:

To evaluate the maintainer and restorer lines for yield contributing traits of hybrid rice.

Methodology:

Seven maintainer and 30 restorer lines were evaluated to identify promising parental lines in respect of yield contributing traits for developing heterotic rice hybrids. Twenty one days old single seedling was transplanted with a spacing of 20 ×15 cm in RCB design with three replications. The unit plot size was 1.8 m × 1.0 m. Adequate soil fertility was ensured by applying Urea-TSP-MP-Gypsum- ZnSO4@ 150:100:70:60:10 kg/ha, respectively. Total TSP, MP, gypsum, and ZnSO₄were applied during final land preparation. The urea was applied in three installments, at 15 days after transplanting (DAT), 30 DAT, and 45 DAT. Necessary intercultural operations was carried out during cropping period for proper growth and development of the plants. Five sample plants were randomly selected from each plot excluding the border plants and the following data were recorded: number of effective tillers/ plant, days to 50% flowering (d), days tomaturity (d), flag leaf length (cm), number of panicles/m2, panicle weight (g), spikelet fertility (%), 1000-grain weight (g) and grain yield/plot (kg). Data were
analyzed according to MSTAT C software.

Source of Information: Bangladesh Journal of Agricultural Research, 38(4): 553-562, December 2013

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 15000/-

Total Budget (Tk.) : 15000/-

Achievement/Findings:

Due to good yield and yield contributing characters of Gan46B and BRRI9B, their corresponding A-lines could be used as female parents in hybrid seed production if early maturing restorer lines specific to these A lines are available. Restorer line BR168R could offer high yield potentiality in heterosis breeding due to its superior yield contributing characters in local environment and selection of such restorer line for hybrid seed production would be effective if growth duration of CMS parent was more or less similar to BR168R as well as proper row ratio of this combination, appropriate amount of GA₃ doses with proper application time, management practices and supplementary pollination is maintained for hybrid rice seed production.

Knowledge Management: Journal