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Correlation and Path Coefficients Analyses in Basmati Rice

M. Ratna
Spices Research Centre, Bangladesh Agricultural Research Institute (BARI), Bangladesh.

S. Begum
Scientific Officer
Plant Breeding Division, BARI, Bangladesh.

A. Husna
Department of Biotechnology, Patuakhali Science and Technology University,

S. R. Dey
Plant Breeding Division, BARI, Bangladesh.

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

Abstract/ Executive Summary:

Correlation and path coefficients analyses among fourteen morphological characters were studied in six advanced lines of Basmati rice and one commercial check namely BRRI dhan29. In general, genotypic correlation coefficients were higher than the corresponding phenotypic correlation coefficients suggesting that the environmental influence reduces the relationship between yield and yield contributing characters of rice. Correlation coefficient analysis showed significant positive correlation between plant height and panicle length at genotypic level. Number of filled spikelets/panicle showed significant positive correlation with yield at both genotypic and phenotypic levels but significant negative correlation was observed between plant height and yield. Number of effective tillers/plant had negative significant correlation with panicle length and with number of unfilled spikelets/panicle at genotypic level. Number of ineffective tillers/plant had significant negative correlation with 1000-seed weight at both genotypic and phenotypic levels. Path coefficient analysis revealed highest positive direct effect of number of filled spikelets/panicle on grain yield but plant height and number of unfilled spikelets/panicle had negative direct effect on grain.

Keywords: Correlation coefficient, Genotypic level, Path coefficient, Rice

Location: Sher-e-Bangla Agricultural University, Dhaka

Start Date: 00-01-2009

End Date:

Program Area: Variety and Species

Commodity: Rice

Objectives:

To look into the effective improvement of rice, its character associations as well as the nature and the extent of direct and indirect effects on yield.

Methodology:

The study was conducted in the experimental field, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh. The experimental field belongs to the Agro-ecological zone of "The Modhupur Tract", AEZ-28. Soil pH ranged from 6.0-6.6 and had organic matter of 0.84%. Six different advanced lines of Basmati rice namely S1, S2, S5, 42(i), 42(ii), 44(i) collected from Department of Genetics and Plant Breeding from the same University were studied. BRRI dhan29 collected from Bangladesh Rice Research Institute was used as check. The experiment was laid out in Randomized Complete Block Design with three replications and with a plot size of 1.5m × 3.5m. Recommended cultural practices were followed through the growth period to raise the better crop. The fertilizers N, P, K, S and B in the form of urea, TSP, MOP, Gypsum and Borax, respectively were applied. The entire amount of TSP, MOP, Gypsum and Borax were applied during the final preparation of land. Urea was applied in two equal installments at tillering and panicle initiation stage. Rice seedlings were transplanted in the spacing of 30cm × 25cm on January, 2009. Data were recorded on plant height (cm), days to 50% flowering, days to maturity, number of effective tillers/plant, number of ineffective tillers/plant, number of total tillers/plant, panicle length (cm), number of filled spikelet/panicle, number of unfilled spikelets/panicle, number of total spikelets/panicle, weight of 1000-seeds (g), grain yield/plant (g), grain yield/plot (kg). Estimation of phenotypic (r_p) and genotypic (r_g) correlation coefficients were estimated. The path coefficients were calculated.

Source of Information: Bangladesh J. Agril. Res. 40(1): 153-161, March 2015, ISSN 0258-7122

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

In general, genotypic correlation coefficients were higher than the corresponding phenotypic correlation coefficients suggesting that the environmental influence reduces the relationship between yield and yield contributing characters of rice. Correlation coefficient analysis showed significant positive correlation between plant height and panicle length at genotypic level. Number of filled spikelets/panicle showed significant positive correlation with yield at both genotypic and phenotypic levels but significant negative correlation was observed between plant height and yield. Number of effective tillers/plant had negative significant correlation with panicle length and with number of unfilled spikelets/panicle at genotypic level. Number of ineffective tillers/plant had significant negative correlation with 1000-seed weight at both genotypic and phenotypic levels. Path coefficient analysis revealed highest positive direct effect of number of filled spikelets/panicle on grain yield but plant height and number of unfilled spikelets/panicle had negative direct effect on grain.

Knowledge Management: Journal