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Phenotypic and Genotypic Correlation Co-efficient of Quantitative Characters and Character Association of Aromatic Rice

Dilruba Karim
Senior Scientific Officer (SSO)
Soil Resource Development Institute (SRDI), DPS Section, Head Office, Ministry of Agriculture, Dhaka, Bangladesh

Jakia Sultana
Dept. of Horticulture, BSMRAU, Gazipur

Abstract/ Executive Summary:

An experiment was conducted in research fields under the Department of Genetics and Plant Breeding of Bangabandhu Sheikh Mujibur Rahman Agricultural University in Bangladesh to study Phenotypic and genotypic correlation co-efficient of quantitative characters and character association of aromatic rice. Forty-one aromatic rice germplasm of diverse sources were used to assess the character association and contribution of characters towards grain yield. Path coefficient analyses were carried out for selected genotypes and to find out the direct and indirect effect of component characters on grain yield. Analysis of phenotypic and genotypic correlation co-efficient of quantitative characters and partitioning of genotypic correlation to grain revealed that the correlation coefficients of grain yield per hill with 1000-grain weight and harvest index were positive and highly significant. Spikelet sterility showed highly significant negative correlation with grain yield at genotypic level only. The parameter 1000-grain weight showed the highest positive direct effect on grain yield. Panicle length and spikelet sterility showed negative negligible direct effect. The highest positive indirect effect was observed for 1000-grain weight via plant height and the highest negative indirect effect for 1000-grain weight via number of filled grains per panicle. Data of this study might be useful for quantitative assessment of the variation in yield and yield components, their interrelationship, and direct and indirect effects of different characters on grain yield of aromatic rice

Keywords: Rice, Phenotypic coefficient, Genotypic coefficient Correlation, Grain Yield

Location: Department of Genetics and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur-1706

Start Date: 00-07-2003

End Date: 00-11-2003

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

To study Phenotypic and genotypic correlation co-efficient of quantitative characters and character association of aromatic rice

Methodology:

The experiment was conducted in the field under the Department of Genetics and Plant Breeding of Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur-1706, Bangladesh, during July to November 2003. The experimental field was typically rice growing low land. The location of the experimental site was at 240 09′ N latitude and 90o 26′ E longitude with an elevation of 8.4 m from the mean sea level. The soil of the experimental field was Red Brown Terrace type under Salna soil series of the Madhupur Tract within Agro Ecological Zone (AEZ) 28. The experimental site is characterized by heavy rainfall during June to September and scanty rainfall during rest of the year. Forty-one aromatic rice germplasm of diverse sources were used in this experiment are shown below and further classified by Karim et al. (2007). The experiment was conducted using Randomized Complete Block Design (RCBD) with three replications. Two lines of 3 m long were constituted as experimental unit. Single seedling/hill was transplanted maintaining 20 cm × 20 cm spacing from row to row and plant to plant, respectively. Urea, TSP, MP and Gypsum were applied @ 150-100-70-60/h respectively as per recommendation for rice cultivation by Bangladesh Rice Research Institute (BRRI). The experimental crops were harvested plot wise at maturity. The harvested crops were threshed, cleaned and processed. Necessary data were collected on various crop characters. Data were collected from 10 randomly selected hills from the middle of the paired rows in order to avoid border effects. The following characters were studied: i) Days to maturity, i) Plant height (cm), iii) Number of panicles per hill, vi) Panicle length (cm), v) Number of primary branches per panicle, vi) No. of filled grains per panicle, vii) Spikelet sterility (%), viii) 1000-grain weight (g), ix) Grain yield per hill (g) and x) Harvest index. The aromatic rice germplasm from diverse sources which are used for this experiment. Statistical analysis: All data obtained for each character were subjected for the analysis of variance. Mean, range and standard deviation for each character were also estimated. The mean sum of square (MS) of error and phenotypic variances were estimated followed . The error mean sum of square was considered as error variance. Genotypic variances (σ 2 g) were divided by subtracting error mean sum of square from the variety mean sum of square and dividing by number of replications Genotypic and phenotypic coefficient of variation were calculated by the formula suggested.

Source of Information: Journal of Bioscience and Agriculture Research, Vol. 01 (01): 34-46, 2014

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Based on the findings of the present investigation the following conclusion could be made; the correlation coefficients of grain yield per hill with 1000-graion weight and harvest index were positive and highly significant. Spikelet sterility showed highly significant negative correlation with grain yield at genotypic level only. The parameter 1000-grain weight showed the highest positive direct effect on grain yield. Panicle length and spikelet sterility showed negative negligible direct effect. The highest positive indirect effect was observed for 1000-grain weight via plant height and the highest negative indirect effect for 1000-grain weight via number of filled grains per panicle.

Knowledge Management: Journal