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Genetic Variability, Correlation and Path Coefficient Analysis of Morphological Traits in Some Extinct Local Aman Rice (oryza Sativa L)

Shajedur Hossain
Supreme Seed Company Limited, Mymenshing, Bangladesh.

Maksudul Haque MD
Scientific officer (Golden Rice)
Plant Breeding Division, Bangladesh Rice Research Institute, Gazipur 1701, Bangladesh.

Jamilur Rahman
Department of Genetics & Plant Breeding, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh.

Abstract/ Executive Summary:

Thirty five local aman rice varieties were evaluated for their variability with regards to yield and yield components. Estimates of heritability and genetic advance in per cent of mean were also obtained for the above traits. In addition, studies on character associations and path coefficients were also undertaken. The highest σ²g was found for number of root hair (103415.40) and the lowest magnitude of σ²g was observed in number of primary branches per panicle (1.97). The highest σ²p was found for number of root hair (109410.31) and the lowest magnitude of σ²p was observed in number of primary branches per panicle (2.61). High GCV and PCV for number of effective tiller, root weight, number of root hair and grain yield per hill (g) indicated that selection of these traits would be effective. Correlation of Grain yield per hill was found to be highly significant and positive for number of root hair, days to flowering and plant height at both genotypic and phenotypic level and negatively significant for number of secondary branches per panicle at both level. Significant positive correlation of grain yield per hill with number of root hair, days to flowering and plant height implied that selection for these characters would lead to simultaneous improvement of grain yield in rice. Further, yield was observed to be positively associated with panicle bearing tillers and number of filled grains per panicle and these characters were noticed to exert high direct effects on grain yield per plant. High indirect effects of most of the traits were noticed mostly through panicle bearing tillers per hill indicating importance of the trait as selection criteria in crop yield improvement programs.

Keywords: Correlation, Genetic advance, Heritability, Path co-efficients, Rice (Oryza sativa L)

Location: Sher-e-Bangla Agricultural University (SAU), Sher-e-Bangla Nagar, Dhaka

Start Date: 00-07-2012

End Date: 00-12-2012

Program Area: Variety and Species

Commodity: Rice

Objectives:

To elucidate information on variability, heritability, genetic advance, character associations and path of effect in promising rice genotypes.

Methodology:

The study was conducted at the experimental farm of Sher-e-Bangla Agricultural University (SAU), Sher-e-Bangla Nagar, Dhaka-1207 during the period from July 2012 to December 2012. The experimental field was located at 90º33.5´ E longitude and 23º77.4´ N latitude at an altitude of 9 meter above the sea level. The soil of the experiment site was a medium high land, clay loam in texture and having pH 5.47-5.63. The land was located in Agro-ecological Zone of ‘Madhupur Tract’ (AEZ No. 28). The climate of the experimental site is sub-tropical characterized by heavy rainfall during April to July and sporadic during the rest of the year. The experimental plots were laid out in randomized complete block design (RCBD). The field was divided into three blocks; representing three replications. Thirty five genotypes were distributed to each plot within each block randomly. The experimental materials of the study comprised of 35 rice genotypes. Thirty five separate strips were made and sprouted seeds were sown on each strip in 14^th July of 2012. The experimental plot was fertilized by applying urea, TSP, MP and Gypsum @ 180, 100, 70 & 60 Kg/ha, respectively. Total TSP, MP and Gypsum were applied at final land preparation. Total urea was applied in three installments, at 15 days after transplanting (DAT), 30 DAT and 50 DAT. The seeds were collected from Bangladesh Institute of Nuclear Agriculture, Mymensingh (BINA).

Source of Information: J Rice Res 2015, Vol. 4(1), ISSN: 2375-4338

Article Link (Online Journal): http://dx.doi.org/10.4172/2375-4338.1000158

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Thirty-four local varieties of rice along with one standard check were evaluated for thirteen yield and yield attributing traits. Results of the present investigation on variability, heritability and genetic advance indicated a scope for improvement of grain yield through selection. Further, studies on character association and path co-efficient revealed the importance of panicle bearing tillers per hill and number of filled grains per panicle as selection criteria for effective yield improvement. The study also indicated the need for balanced selection in light of negative association of panicle bearing tillers per hill with number of filled grains per panicle; and number of filled grains per panicle with 1000-grain weight in crop yield improvement programs.

Knowledge Management: Journal