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Genetic Diversity and Parents Selection from Exotic Rice (oryza Sativa L.) Germplasm

A. A. Mamun
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. M. Hossain
Department of Horticulture, Bangabandhu Sheik Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh.

Abstract/ Executive Summary:

Genetic divergence among fifty exotic rice genotypes along with two check varieties were estimated using D2 and principal component analysis. The study was undertaken to select suitable donor parents for use in improved breeding program of Bangabandhu Sheikh Mujibur Rahman Agricultural University in 2009. Principal component analysis (PCA) revealed that the first five axes accounted for 58.10% of the total variation. As per cluster analysis, the genotypes were grouped into seven clusters consisting 11, 16, 7, 11, 1, 2 and 4 genotypes which revealed that there exist considerable diversity among the genotypes. Considering the magnitude of genetic distance, contribution of different characters towards the total divergence and magnitude of cluster means for different characters, the genotypes RG-BU-08-057, 61, 65, 67, 69, 71, 85, 86, 88, 94, 96, 98 and 99 might be selected as a suitable parent for future hybridization program.

Keywords: Rice (Oryza sativa L.), Genetic variability, Parents, Hybridization.

Location: Department of Genetics and Plant Breeding of Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Salna, Gazipur

Start Date: 00-00-2009

End Date:

Program Area: Variety and Species

Commodity: Rice

Objectives:

The present investigation was undertaken to search suitable diverse germplasm as suitable donor parents for the utilization in future breeding program.

Methodology:

A total of fifty exotic rice genotypes and two varieties, collected from Department of Genetics and Plant Breeding of Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Salna, Gazipur namely: RG-BU-08-051 to RG-BU- 08-100, BRRI dhan28 and BRRI dhan29, were grown at the experimental farm of BSMRAU, Gazipur following randomized block design with three replications in 2009. The field was divided into three blocks, the blocks were subdivided into 52 plots where genotypes were randomly assigned. The unit plot size was 12.5m × 2.5m. Each plot had two lines. Row to row and plant to plant distances were 25cm and 20cm respectively. Standard agronomic practices were followed to raise a good crop. Observations were recorded on days to first flowering (DFF), days to 50% flowering (50%DF), days to harvesting (DH), anther length (AL), anther breadth (AB), stigma length (SL), stigma breadth (SB), pollen sterility (PS), pollen fertility (PF), spikelet sterility (SS), out crossing rate (OCR), filled grains per panicle (FGP), unfilled grains per panicle (UGP), grain length (GL), grain breadth (GB) and grain yield per hill (GYH). Data were subjected to both univariate and multivariate analysis. Under multivariate analysis Principal Component Analysis (PCO), Principal Coordinate Analysis (PCA), Cluster Analysis (CA) and Canonical Vector Analysis were done by using GENSTAT 5.5 program.

Source of Information: Bangladesh J. Pl. Breed. Genet, 25(1): 11-16, 2012

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Considering the magnitude of genetic distance, contribution of different characters towards the total divergence and magnitude of cluster means for different characters the genotypes RG-BU-08-057, 61, 65, 67, 69, 71, 85, 86, 88, 94, 96, 98, & 99 might be selected as parents for efficient hybridization program.

Knowledge Management: Journal