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Variability Study of Advanced Fine Rice with Correlation, Path Co-efficient Analysis of Yield and Yield Contributing Characters

M A Rahman
Department of Genetics and Plant Breeding, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

M S Hossain
Department of Genetics and Plant Breeding, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

I F Chowdhury
Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

M A Matin
Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

H Mehraj
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

Abstract/ Executive Summary:

The experiment was conducted in experimental Farm, Sher-e-Bangla Agricultural University, Bangladesh from July to December 2011 to study the variability of advanced lines of fine rice with correlation and path co-efficient of yield and yield contributing characters. Seven newly developed lines viz. S-1, S-2, S-5, AL-33(II), AL-36, AL-42(II), AL-44(I) and Chinigura. Grain yield/plant of newly developed advanced fine rice lines and check showed positive association in respect of number of effective tillers/hill (0.308), number of filled spikelets/panicle (0.110) and weight of 1000-grains (0.109), whereas significant negative association with panicle length (-0.609), number of unfilled spikelets/panicle (-0.542) and non significant negative association with plant height (-0.136) and number of ineffective tillers/hill (-0.304). Path analysis revealed that plant height had positive direct effect (0.154), number of effective tillers/hill had positive direct effect (0.065), number of ineffective tillers/hill had negative direct effect (-0.114), panicle length had positive direct effect (0.163), number of filled spikelets/panicle had positive direct effect (0.285), number of unfilled spikelets/panicle had negative direct effect (-0.154), weight of 1000-grains had positive direct effect (0.234) on grain yield/plant.

Keywords: Fine rice, Variability, Correlation and path co-efficient

Location: Experimental Farm, Sher-e-Bangla Agricultural University, Bangladesh

Start Date: 00-07-2011

End Date: 00-12-2011

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

To study the variability of advanced lines of fine rice with correlation and path co-efficient of yield and yield contributing characters.

Methodology:

The experiment was conducted at experimental farm, Sher-e-Bangla Agricultural University (SAU), Dhaka, Bangladesh during the period from July to December 2011 to study the variability of advanced lines of fine rice (Oryza sativa) with correlation and path co-efficient of yield and yield contributing characters. Seven advanced fine rice lines of 10^th generation viz. S-1, S-2, S-5, AL-33(II), AL-36, AL-42(II) and AL-44(I) were collected from Department of Genetics and Plant Breeding, SAU and Chinigura rice were collected from Bangladesh Rice Research Institute and used as check variety for this study. The experiment was laid out in Randomized Complete Block Design with three replications. Each plot size was 2.5 m × 2.0 m. Urea (150 kg/ha), TSP (100 kg/ha), MP (100 kg/ha), gypsum (60 kg/ha), zinc sulphate (10 kg/ha) and borax (150 kg/ha) were applied. The entire amount of TSP, MP, gypsum, zinc sulphate and borax were applied during the final preparation of plot land. Mixture of cowdung and compost was applied @ 10 t/ha during 15 days before transplantation. Urea was applied in three equal installments at after recovery, tillering and before panicle initiation. Rice seedlings were transplanted in lines each having a line to line 30 cm and plant to plant 25 cm distance. Flood irrigation was given to maintain a constant level of standing water up to 6 cm in the early stages to enhance tillering and 10-12 cm in the later stage to discourage late tillering. The field was finally dried out 15 days before harvesting. Data were collected on plant height, number of effective tillers/hill, number of in-effective tillers/hill, number of total tillers/hill, panicle length, number of filled spikelets/panicle, number of unfilled spikelets/panicle, number of total spikelets/panicle, weight of 1000 seeds, grain yield/plant, grain yield/m² (converted into yield/ha) and grain yield/plot. Genotypic and phenotypic variances were estimated with the help of the formula suggested. Genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) were calculated by formula as suggested. Heritability in broad sense was estimated by the formula as suggested. Genetic advance in percentage of mean was calculated by formula. Path co-efficient analysis was done according to the procedure employed, The data obtained for different grain size and shape were statistically analyzed to find out the significance of the difference for different newly developed lines of advanced fine rice. The mean values of all the recorded characters were evaluated and analysis of variance was performed by the F (variance ratio) test. The significance of the difference of means was estimated by Duncan’s Multiple Range Test (DMRT) at 5% level of probability and correlation was estimated by using SPSS computer package program at 1% and 5% level of significance.

Source of Information: Int. J. Appl. Sci. Biotechnol, Vol 2(3): 364-370, 2014

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

As these trait possessed high variation, it was potential for effective selection for further genetic improvement and breeder may expect reasonable benefit in next generation in respect ofthis trait. Path analysis revealed that plant height, number of effective tillers/hill, panicle length, number of filled spikelets/panicle and weight of 1000-grains had positive direct effect while number of ineffective tillers/hill and unfilled spikelets/panicle had negative direct effect on grain yield/plant.

Knowledge Management: Journal