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Genetic Variability and Path Analysis in Exotic Hybrid Rice Genotype

Mosammat Umma Kulsum
Scientific Officer
Hybrid Rice Division Bangladesh Rice Research Institute Gazipur-1701

Dr.Md. Jamil Hasan
Principal Scientific Officer and Head
Hybrid Rice Division Bangladesh Rice Research Institute Gazipur-1701

A. A. Khan
Scientific Officer
Wheat Research Centre RARS, Ishurdi Pabna

M. Z. Ullah
Senior Breeder
Energypac Agro Ltd. Bangladesh

A. H. M. A. Rahman
Asstt. Registrar
Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur-1706

Abstract/ Executive Summary:

Genotypic and phenotypic coefficients of variation were high for grain yield and nimber of spikelets per panicle, moderate for 1000 grain weight and low for growth duration, panicle length and panicles per m². High heritability accompanied by high to moderate genetic advance for number of spikelet per panicle, 1000 grain weight and grain yield indicated the predominance of additive gene action for the expression of these characters. Grain yield was found to be positively and significantly correlated with plant height, number of panicle per m², number of spikelet per panicle, 1000 grain weight and growth duration at both genotypic and phenotypic levels indicating the importance of these characters for yield improvement in this population. The results of genetypic path analysis revealed that spikelet number per panicle had the highest positive direct effect followed by 1000 grain weight and growth duration.

Keywords: Correlation coefficient, Genotype, Genetic advance and Heritability

Location: Gazipur

Start Date: 00-00-2008

End Date: 00-00-2009

Program Area: Variety and Species

Commodity: Rice

Objectives:

To know the variability and correlation among yield and its contributing characters using 17 rice hybrids for selecting best contributor towards yield

Methodology:

Seventeen exotic rice hybrids along with three check varieties were grown in a randomized complete block design with three replications at the experimental farm of Bangladesh Rice Research Institute, Gazipur during boro season 2008-2009. Thirty days old seedlings were transplanted in each plot of 30 m² size with spacing of 15x20 cm plant to plant and 20x20 cm row to row. Necessary intercultural operation was made during cropping period for proper growth and development of the plants. Data were collected from five randomly selected plants of each hybrids per replication for yield ton per hectare and six yield components viz. plant height (cm), panicle length (cm), number of panicle per m², number of spikelet per panicle, 1000 grain weight (gm) and growth duration. The data were subjected to analysis of phenotypic and genotypic coefficients of variability (Burton,1952), heritability and genetic advance (Johnson et al. 1955a), genotypic and phenotypic correlation (Johnson et al. 1955b) and path coefficients (Dewey and Lu 1959).

Source of Information: Annals of Bangladesh Agriculture (2011) 15 (1&2): 67-77

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 17000

Total Budget (Tk.) : 17000

Achievement/Findings:

The overall results indicated that selection favoring larger number of spikelets per panicle and 1000 grain weight with reasonable balance for moderate growth duration would help to achieve higher grain yield in this population of rice hybrids.

Knowledge Management: Journal