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Variability, Heritability and Genetic Advance in Fine Rice (oryza Sativa L.) Available in Bangladesh

S. Akter
Department of Genetics and Plant Breeding, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, Bangladesh.

B.K. Biswas
Department of Genetics and Plant Breeding, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, Bangladesh.

A.K. Azad
Department of Genetics and Plant Breeding, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, Bangladesh.

M. Hasanuzzaman
Department of Genetics and Plant Breeding, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, Bangladesh.

M. Arifuzzaman
Department of Genetics and Plant Breeding, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, Bangladesh.

Abstract/ Executive Summary:

A field experiment was conducted with 30 fine rice genotypes for morpho-physiogenic traits analysis. A remarkable variation in plant characters and yield performance was noticed among the fine rice. Ranjid gave the highest grain yield (4.32 t/ha) and Dudshor (4.18 t/ha) and Silkumul (4.16 t/ha) gave considerably higher yield. While Lalfota produced the minimum (2.40 t/ha) yield. Phenotypic variance against yield/ha (0.490) was higher than the corresponding genotypic variance (0.301). This indicated the existence of much influence of environment on the expression of the character. This character showed high genotypic (15.85) as well as phenotypic (20.23) co-efficient of variation associated with moderate heritability (62.42%). On the other hand, plant height, spikelets/panicle and sterility (%) were highly heritable. Lodging percentage was highly influenced by environment.

Keywords: Heritability, Genetic advance, Yield-related traits, Fine rice

Location: Department of Genetics and Plant Breeding, Hajee Mohammad Danesh Science and Technology University, Dinajpur

Start Date: 00-06-2008

End Date: 00-12-2008

Program Area: Variety and Species

Commodity: Rice

Objectives:

i) To study the physiological and morphological characters of the fine rice genotypes.

ii) To study the genetic variation of some important quantitative characters among the fine rice.

iii) To find out the genetic parameters in the selected genotypes.

Methodology:

The experiment was conducted at the experimental field of Department of Genetics and Plant Breeding, Hajee Mohammad Danesh Science and Technology University, Dinajpur during the period from June to December 2008 to study the morphophysiogenic traits in fine rice. The experimental plot was laid out in Randomized Complete Block Design with three replications. Each replication contained the plants of 30 genotypes having 20x 15 cm spacing. Each plot was 2m in length and 1.5m in breadth. The genotypes were randomly distributed to each plot within the blocks. The land was prepared properly and agronomic practices were done when necessary The following fertilizer and manure doses were applied in the field. All of the fertilizers except urea were applied as basal dose at the time of final land preparation. Urea (150 kg ha^-1) was applied in equal three splits. The first dose of urea was applied at 21 days after transplanting (DAT). The second dose of urea was added as top dressing at 45 days (active vegetative stage) after transplanting and third dose was applied at 60 days (panicle initiation stage) after transplanting recommended by BRRI. Data on different yield and yield contributing characters were recorded on plot and plant basis at different dates as per experimental requirements. Data were recorded on the following crop characters-Leaf angle just below the flagleaf (degree), Plant height(cm), Panicle length(cm), Spikelets/panicle, Tillerslhill(at vegetative stage), Tillerslhill(at maturity stage), Effective tillerslhill, Days to first flowering, Days to maturity, 1000-grain weight(g), Yield/hill(g), Yield/ha(t), Sterility (%), Phenotypic acceptability and Lodging percentage. The collected data were compiled and tabulated in proper form for statistical analysis. Analysis of variance was done following Randomized Complete Block Design (RCBD) with the help of a computer package (MST AT) and the mean differences among the varieties were adjudged by Duncan's Multiple Range Test.

Source of Information: Journal of Science Technology (Dinajpur) Vol. 8: 183-192 (2010), ISSN 1994-0386

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

A total of fifteen characters were considered to assess the source of variation against thirty genotypes. The genotypes differentially responded and Ranjit was the highest yield potential (4.32 t/ha), Ranjit and Silkamal showed zero lodging. In general, heritability was not analogous to genetic variance due to the effect of environment over the expression of the characters. Better response to selection could be achieved for the characters except yieldlhill, yieldlha and lodging percentage. Through the heritability of lodging percentage was not appreciable yet it could not create maximum load while measured as genetic advance as % of mean (125.93). The thirty genotypes exerted a comprehensive phenotypic acceptability from vegetative phase to reproductive phase. The yield potential of the genotypes were influenced by the most of the selected characters.

Knowledge Management: Journal