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Association of Yield and Yield Related Traits in Aromatic Rice (oryza Sativa L.)

A, H. Akhi
Scientific Officer
Plant Breeding Division, Bangladesh Agricultural Research Institute (BARI), Gazipur,

M. A. K. Miah
Professor
Dept. of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur–1706,

N. A. Ivy
Professor
Dept. of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur–1706

A. Islam
Senior Scientific officer
RARS, BARI, Hathazari, Chittagong

M. Z. Islam
Scientific officer
Genetic Resources and Seed Division, BRRI, Gazipur, Bangladesh

Abstract/ Executive Summary:

Sixty cross combinations of SakkhorkhoraR and IR58025A were studied in the experimental field of Bangabundhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Salna, Gazipur during July 2010 to November 2010, to assess the character association & contribution of characters towards grain yield in restorer lines. The correlation study revealed that days to first flowering showed significant positive relationship with seed yield per plant at genotypic levels. Days to maturity showed significant positive relationship with number of tillers per plant at both genotypic and phenotypic level and effective panicles per plant at genotypic level. Plant height showed highly significant positive relationship with effective panicles per plant at both genotypic and phenotypic level. Path analysis study revealed that effective panicles per plant (0.2153) had the highest positive direct effect followed by days to first flowering (0.1492), plant height (0.0646), spikelet fertility status (%) (0.0242) and number of seeds per panicle (0.0241). Days to maturity, spikelet sterility status, effective panicles per plant, plant height, number of tillers per plant, number of seeds per panicle and spikelet fertility status had positive indirect effects on grain yield. So, based on the study days to first flowering, plant height, spikelet fertility status ,effective panicles per plant were identified as the important characters to be considered in the selection for improvement of aromatic rice genotypes.

Keywords: Aromatic rice, Character association, Path analysis.

Location: At the experimental farm of BSMRAU

Start Date: 00-07-2010

End Date: 00-11-2010

Program Area: Variety and Species

Commodity: Rice

Objectives:

The present study was undertaken to gather some useful information on character association and path coefficient analysis in a set of 60 F₁ families of aromatic rice genotypes.

Methodology:

The experiment was conducted at the experimental farm of BSMRAU during July 2010 to November 2010. Sixty F₁ (IR58025A x Sakkorkhora R) families of aromatic rice genotypes were planted in randomized complete block design with three replication at the rate of one seedling per hill. Each entry was planted in one rows of 5 m long plot with a spacing of 20 cm x 20 cm from plant to plant and row to row respectively. Adequate soil fertility was ensured by applying urea, TSP, MoP and Gypsum @ 180-100-70-60 kg/ha, respectively. Total TSP, MoP and Gypsum were applied in final land preparation. And total urea was applied in three installments, at 15 days after transplanting (DAT), 30 DAT and 50 DAT recommended by Anon. (1999). After transplanting various intercultural operations and irrigation were applied for better growth and development of the seedlings. Data were recorded on the parameters from 5 randomly selected plants from the middle rows of each plot on days to first flowering, days to maturity, plant height (cm), number of tillers per plant, number of effective panicles per plant, spikelet fertility status (%), spikelet sterility status (%), number of seeds per panicle, seed yield per plant (g). For calculating the genotypic and phenotypic correlation co-efficient for all possible combinations the formula suggested by Miller et al. (1958), Johnson et al. (1955) and Hanson et al. (1956) were adopted. Path coefficient analysis was done according to Dewey and Lu (1955).

Source of Information: Bangladesh J. Agril. Res. 41(3): 387-396, September 2016 ISSN 0258-7122 (Print), 2408-8293 (Online)

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

It is obvious from the results that the traits effective panicles per plant had the highest positive direct effect on yield and positive genotypic association as well with grain yield. And other traits such as days to first flowering, plant height, spikelet fertility status (%) do have high positive direct effect and positive genotypic association as well with grain yield. So these parameters may be given prime importance for the direct improvement of grain yield in this group. Number of seeds per panicle showed the high positive direct effect but this parameter has negative genetic association.

Knowledge Management: Journal