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Variability and Character Association of Reproductive Traits in Exotic Rice Germplasm

T. Akter
Department of Genetics and Plant Breeding Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh.

N. A. Ivy
Department of Genetics and Plant Breeding Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh.

M. G. Rasul
Department of Genetics and Plant Breeding Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh.

M. A. K. Mian
Department of Genetics and Plant Breeding Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur 1706, Bangladesh.

Abstract/ Executive Summary:

Fifty two genotypes were evaluated to find out the genetic variability, character association, and path coefficient for reproductive traits of exotic rice germ plasm in experimental field of Bangabandhu Sheikh Mujibur Rahman Agricultural University, Salna, Gazipur during December 2008 to May 2009. The analysis of variance showed significant variation for all the characters indicating wide genetic variability among the genotypes. The highest genotypic variance and phenotypic variance were found for pollen sterility and filled grains per panicle. High heritability and genetic advance were recorded for pollen sterility. Filled grains per panicle, days to 50% flowering, and pollen sterility of different genotypes had a high degree of significant positive association with grain yield per hill. On the basis of genetic parameters, associations and path analysis 52 genotypes might be selected considering the filled grains per panicle only.

Keywords: Variability, Correlation coefficient, Path coefficient, Exotic rice

Location: BSMAU, Gazipur

Start Date: 00-12-2008

End Date: 00-05-2009

Program Area: Variety and Species

Commodity: Rice

Objectives:

To study variability, correlation and path coefficient analysis in reproductive traits of exotic rice germ plasm.

Methodology:

The experiment was carried out at the experimental field of Bangabandhu Sheikh Mujibur Rahman Agricultural University, Salna, Gazipur during December, 2008 to May, 2009 using 50 exotic rice genotypes and two variety. The experimental plots were laid out in randomized complete block design (RCBD) with three replications. The plot size was 12.5m x 2.5m. Forty days old seedlings were transplanted with a spacing of 25cm and 20cm between rows and between plants, respectively. The experimental plot was fertilized by applying urea, TSP, MP and Gypsum @180-100-70-60 Kg/ha, respectively. Total TSP, MP and Gypsum were applied at final land preparation. Total urea was applied in three installments, at 15 days after transplanting (DAT), 30 DAT and 50 DAT recommended by BSMRAU (Anon., 1999). Necessary intercultural operation was made during cropping period for proper growth and development of the plants. Irrigation with regular interval was given to maintain 5-7 cm water up to hard dough stage of rice. Data were collected from 5 hills of each genotype on individual plant basis on days to first flowering (DFF), days to 50% flowering (50%DF), days to harvesting (DH), pollen sterility (PS), spikelet sterility (SS), filled grains per panicle (FGP), grain length (GL), grain breadth (GB) and grain yield per hill (GYH). The statistical analysis for various characters under investigation were done and the analysis of variance for each of the characters was performed by F test and mean values were separated by LSD method. Variability, correlation coefficient and path coefficient analysis was performed (Burton, 1952, Johnson et al., 1955 and Singh and Chaudhary, 1985).

Source of Information: Bangladesh J.Pl. Breed. Genet., 23(1): 39-43, 2010

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The analysis of variance showed significant variation for all the characters indicating wide genetic variability among the genotypes. The highest genotypic variance and phenotypic variance were found for pollen sterility and filled grains per panicle. High heritability and genetic advance were recorded for pollen sterility. Filled grains per panicle, days to 50% flowering, and pollen sterility of different genotypes had a high degree of significant positive association with grain yield per hill. On the basis of genetic parameters, associations and path analysis 52 genotypes might be selected considering the filled grains per panicle only.

Knowledge Management: Journal