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Genetic Diversity of Aromatic Rice in Bangladesh

Md. Mizan Ul Islam
Agriculture and Food Security Program, BRAC Agricultural Research and Development Centre, Gazipur-1701, Bangladesh

Parth Sarothi Saha
Agriculture and Food Security Program, BRAC Agricultural Research and Development Centre, Gazipur-1701, Bangladesh

Tusher Chakrobarty
Agriculture and Food Security Program, BRAC Agricultural Research and Development Centre, Gazipur-1701, Bangladesh

Nibir Kumar Saha
Agriculture and Food Security Program, BRAC Agricultural Research and Development Centre, Gazipur-1701, Bangladesh

Md. Sirajul Islam
Agriculture and Food Security Program, BRAC Agricultural Research and Development Centre, Gazipur-1701, Bangladesh

MA Salam
Agriculture and Food Security Program, BRAC Agricultural Research and Development Centre, Gazipur-1701, Bangladesh

Abstract/ Executive Summary:

The nature and magnitude of diversity in 53 aromatic rice genotypes was evaluated in rain fed condition at BRAC Agricultural Research and Development Centre, Gazipur in 2012. The Euclidian method of divergence analysis indicated the presence of appreciable amount of genetic diversity in the material. These aromatic rice genotypes were grouped into six clusters where cluster I was the largest. Inter-cluster distances were larger than the intra-cluster distance revealed that there situated considerable genetic diversity among the genotypes. Based on positive value of vector I and II days to 50% flowering, seed length, and grain yield per hill had maximum contribution towards genetic divergence. Maximum yield contributing traits were accumulated in cluster V and as a result higher grain yield (42.0 g/hill) was obtained in this cluster. The genotypes of cluster V can be used in hybridization program to produce higher yielding breeding materials with all other clusters. The genotypes Cluster IV and cluster V were found most suitable for the respective characters and can be used as potential donor for future breeding programs.

Keywords: Diversity Aroma rice Bangladesh

Location: BRAC Agricultural Research and Development Centre (BARDC), Gazipur, Bangladedsh

Start Date: 00-06-2012

End Date: 00-10-2012

Program Area: Variety and Species

Commodity: Rice

Objectives:

To assess the extent of genetic diversity in 53 aromatic rice genotypes which will help to select prospective parents to develop transgressive segregants.

Methodology:

The present investigation was under taken during rain-fed season (Aman) in 2012 at the BRAC Agricultural Research and Development Centre (BARDC), Gazipur, Bangladedsh. Geographically BARDC is located at 23.975oN latitude and 90.399oE longitude and 14 meters above the mean sea level. The genotypes were grown in 5.4 m x 0.6 m plots following randomized complete block design with three replications. The spacing was 20 cm between rows and 15 cm between plants. The data were recorded for yield and yield attributing characters and quality characters of aromatic rice used in this study. Observations were recorded on five randomly selected plants in each replication from the centre row. Different productive and quality characters viz. days to Days to 50% flowering, plant height (cm), tillers per hill, effective tillers per hill, panicle length (cm), filled grains per panicle, unfilled grains per panicle, total grain, sterility percentage, spikelet density, 1000 seed wt (gm), seed length (mm), seed breadth (mm), kernel length (mm), kernel breadth (mm) and grain yield per hill were recorded. The data were analyzed following Mahalanobis's (1936) generalized distance (D2) extended by Rao (1952). Intra and inter-luster distances were calculated by the methods of Singh and Chaudhary (1985). All statistical analyses were carried out using GenStat 5.5, STAR, version 2.0.1 2014 and PB Tools, version 1.4. 2014 computer software.

Source of Information: Res. Agric. Livest. Fish. Vol. 4, No. 1, April 2017: 01-06

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Evaluated 53 aromatic rice genotypes of the present study are good sources of valuable genes. There is a high degree of diversity existed among the genotypes which needs to be utilized in future varietal improvement and/or development programs. Specifically, the genotypes of clusters V and IV may be selected as parents for hybridization programs to develop high yielding rice varieties with desirable other good characters. Future breeding goal should concentrate on selecting genotypes with high grain yield, long panicle length and more tillers per hill.

Knowledge Management: Journal