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Study on Outcrossing Traits of Some Aromatic Restorer Lines of Hybrid Rice

R R Majumder
Plant Breeding Division, Bangladesh Rice Research Institute, Gazipur

R K Roy
Biotechnology Division, Bangladesh Rice Research Institute, Gazipur

M Khatun
Plant Breeding Division, Bangladesh Rice Research Institute, Gazipur

T K Hore
Plant Breeding Division, Bangladesh Rice Research Institute, Gazipur

K Nahar
Dept. of Agril. Botany, Sher-e-Bangla Agricultural University, Dhaka 1207

U K Majumder
Dept. of Statistics, Hajee Mohammad Danesh Science and Technology University, Dinajpur-5200

Abstract/ Executive Summary:

The path coefficient analysis revealed that anther breadth and pollen fertility of different restorer lines could be effective by direct selection for grain yield/hill. These restorer lines are recommended to use as parent in future hybrid breeding program for developing aromatic hybrids.

Keywords: Rice, Path coefficient, Genotypic and phenotypic correlation, Outcrossing traits

Location: Experimental farm of Dept. of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur

Start Date: 00-11-2007

End Date: 00-05-2008

Program Area: Variety and Species

Commodity: Rice

Objectives:

To assess genetic variability, mean performance, character association and path coefficient analysis for outcrossing traits in rice.

Methodology:

The experiment containing 10 restorer lines were carried out at the experimental farm of Bangabandhu Sheikh Mujibur Rahman Agricultural University, Salna, Gazipur during November 2007 to May 2008. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Two rows of 5 m each constituted the experimental unit. Healthy seedlings of 37 days old were transplanted in separate strips with 25 cm × 20 cm spacing in the experimental field. The land was prepared thoroughly with proper ploughing followed by laddering to attain a good puddled condition. Fertilizers @ 180-100-70- 60 kg/ha urea, TSP, MP and gypsum was applied respectively. All fertilizers except urea were applied at the time of final land preparation. Total amount of urea was applied in three installments at 15 days after transplanting (DAT), 30 DAT and 50 DAT recommended by BRRI. Weeding and other intercultural operation was done as and when necessary. Data were collected from 10 hills from each genotype. Flag leaf area, anther length, anther breadth, pollen diameter, pollen fertility and grain yield/hill was recorded. The statistical analysis for various characters under investigation were done and the analysis of variance for each of the characters was performed by F test and mean values were separated by DMRT using MSTATC program. The analysis of variance was done following standard methods. Genotypic and phenotypic coefficients of variations were computed. Simple correlation coefficient for all the possible pairs of characters at phenotypic and genotypic levels were analyzed. Correlation coefficients were further partitioned into components of direct and indirect effects by path coefficient analysis.

Source of Information: Eco-friendly Agril. J. 7(10): 110-114, 2014 (October); ISSN 1999-7957

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The genetic parameters, correlation and path coefficient analysis of the present study revealed that Chinigura R, Kataribhog R, Benaful R were found superior restorer lines due to their desirable out crossing traits. High GCV, PCV, heritability and genetic advance of anther breadth, pollen fertility and grain yield/hill suggested that these characters could be transmitted to the hybrid progeny and phenotypic selection based on these would be effective. Anther length, anther breadth and pollen fertility showed a high degree of positive correlation with grain yield/hill for restorer lines. The path coefficient analysis revealed that anther breadth and pollen fertility of different restorer lines could be effective by direct selection for grain yield/hill. These restorer lines are recommended to use as parent in future hybrid breeding program for developing aromatic hybrids.

Knowledge Management: Journal