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Combining Ability Effects and Per-se Performances of Morpho Reproductive Traits in Rice (oryza Sativa L.)

M. A. Islam
Dept of Genetics and Plant Breeding, EXIM Bank Agricultural University, Chapainawabgonj, Bangladesh;

M. A. K. Mian
Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh

M. G. Rasul
Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur 1706, Bangladesh

Q. A. Khaliq
Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh.

M. K. Bashar
Country Manager, International Potato Research Centre (CIP), Bangladesh

Abstract/ Executive Summary:

To study combining ability effects of developed CMS and restorer lines an experiment was carried out at the experimental farm, Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Salna, Gazipur during Aman 2011 and Boro 2011-12 following RCBD design through line × tester analysis in three replications. Five known CMS lines and sixteen developed Restorer lines were considered for through line × tester analysis. Among sixteen restorer lines, only four showed significant negative GCA effects for all these three traits for earliness. The estimated of gca effects of parents indicated that seven parents and sixteen crosses contributed highly significant negative effects for plant height which were responsible for dwarfing character. Fifteen crosses and eight parents showed significant negative sca estimates for days to first flowering and twenty crosses for maturity. Considering both SCA effects and per se performances for days to 1st flowering and maturity; the crosses of IR 58025A with RG-BU08- 005R, RG-BU08-006R, RG-BU08-016R, RG-BU08-018R and RG-BU08-025R were found as the best specific combiner. Among 80 crosses fifty two crosses showed significant positive SCA effects along with above average perse performances for grain yield. Ten crosses of IR 58025A, seven crosses of GAN46A, fourteen crosses of IR 62829A, nine crosses of IR 68888A and ten crosses of BRRI 1A showed significant positive SCA effects along with mean values resulting significant positive SCA effects and above average perse performances with all five CMS lines for grain yield.

Keywords: Rice (Oryza sativa L.); GCA effects; SCA effects; Per se performances

Location: Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur

Start Date: 00-00-2011

End Date: 00-00-2012

Program Area: Variety and Species

Non-commodity: Performance

Objectives:

The present investigation was carried out to estimate combining ability effects for yield components involving CMS and restorer lines. Considering the above idea the present investigation was undertaken with the objective to determine the extent of combining ability variances in some morpho-reproductive traits for selection of suitable parents.

Methodology:

An experiment was carried to study combining ability effects of developed CMS and restorer lines at the experimental farm, Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur during Aman 2011 and Boro 2011-12 following RCBD design in three replications. Five known CMS lines and sixteen suspected Rlines were considered for line × tester analysis. Analysis of variances for general and specific combining ability (GCA and SCA) was estimated according to line × tester method (Kempthorne, 1957). Five female parents ( IR 58025A, BRRI 1A, GAN46A, IR 68888A and IR 62820A) and sixteen male parents ( RG-BU08-001R, RG-BU08-002R, RG-BU08-005R, RG-BU08-006R, RGBU08-007R, RG-BU08-013R, RG-BU08-016R, RG-BU08-018R, RG-BU08-025R, RG-BU08- 034R, RG-BU08-038R, RG-BU08-046R, RG-BU08-057R, RG-BU08-063R, RG-BU08-097R and RG-BU08-105R) were used in the experiment. Data were collected from 10 hills of each genotype on 10 randomly selected individual plant basis are Data were collected from 10 hills of each genotype on 10 randomly selected individual plant basis are plant height, days to 1st flowering, days to maturity and grain yield (ton/ha). Data obtained for each character was subjected to the analysis of variance following three replicated randomized complete block design by using GENSTAT program.

Source of Information: Bangladesh J. Pl. Breed. Genet., 26(2): 23-32, 2013

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The crosses of five R-lines, RG-BU08-001R, RG-BU08-002R, RG-BU08-006R, RG-BU08-007R and RGBU08-097R were found resulting significant positive sca effects and above average per se performances with all five CMS lines for grain yield. RG-BU08-002R and RG-BU08-097R were found resulting significant positive sca effects with all yield contributing characters with all five CMS lines. Increased sca effect in yield might be due to significant positive sca values in pollen fertility, spikelets fertility, panicle exertion rate and significant negative sca values. Hossain and Khoyumthem 2005 found similar results in sca effects of several cross combinations. Chen et al. (2002) found high specific combinations of crosses of rice.

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