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Diversity Analysis in Boro Rice (oryza Sativa L.) Accessions During Boro 2004

M. S. Ahmed
Senior Scientific Officer,
Genetic Resources and Seed Division, BRRI, Gazipur-1701, Bangladesh.

Khaleda Akter,
Senior Scientific Officer,
Genetic Resources and Seed Division, BRRI, Gazipur-1701, Bangladesh.

Dr. Mohammad Khalequzzaman,
Principal Scientific Officer,
Genetic Resources and Seed Division, BRRI, Gazipur-1701, Bangladesh.

E. S. M. Harunur Rashid,
Scientific Officer,
Genetic Resources and Seed Division, BRRI, Gazipur-1701, Bangladesh.

Dr. Md. Khairul Bashar,
Chief Scientific Officer and Head,
Genetic Resources and Seed Division, BRRI, Gazipur-1701, Bangladesh.

Abstract/ Executive Summary:

An experiment was conducted with 36 accessions of traditional (local) Boro rice germplasm accessions of three different groups (20 accessions as Kaliboro, 12 as Jagliboro and 4 as Tepiboro). On the basis of D² values, the 36 genotypes were grouped into six clusters with a range of intra (0.00 for cluster II to 1.78 for cluster I) and inter cluster (1.99 between cluster I and III to 21.20 between cluster II and III) distances. Cluster I comprised the highest number of genotypes (10) and cluster II the lowest (1). The highest mean value for seedling height (21.68 cm), 1000-grain weight (20.97 g) and grain yield/hill (6.87 g) were observed in cluster I, II for days to 50% flowering (116), panicle length (22.80 cm), grains/panicle (74), and grain length (8.35 mm), cluster IV for tillers/hill (16.44) and panicles/hill (14.17), cluster V for harvest index (0.32) along with cluster I and VI, and cluster VI for plant height (117.17 cm) and flag leaf area (30.68 cm²). The characters contributed maximum toward diversity were grain length, days to 50% flowering, grains/panicle, grain yield/hill, panicle length, flag leaf area, plant height, seedling height, 1000-grain weight, panicles/hill, harvest index, and tillers/hill. It is apparent from the results that the same name group accessions were quite different from each other.

Keywords: Duplicate sorting, Boro rice, Accession, Diversity

Location: BRRI, Gazipur.

Start Date: 00-00-2004

End Date: 00-00-2004

Program Area: Conservation and Biodiversity

Commodity: Rice

Objectives:

To identify the duplicates of Boro rice accessions with the help of morph-agronomic characters.

Methodology:

An experiment was conducted during Boro season 2004 at BRRI farm to identify the duplicate(s) germplasm preserved in BRRI Genebank that have same names but collected from different places of Bangladesh for the last two to three decades. For this, a total of 36 accessions of traditional (local) duplicate named Boro rice germplasm of three different groups in which 4 Tepi Boro viz. Tepi Boro (258)(Mymensingh) (name, accession number and place of collection), Tepi Boro (930)(Sylhet), Tepi Boro (3998)(Habiganj), Tepi Boro (4526)(Sunamganj), 12 Jagli Boro viz. Jagli Boro (255)(Mymensingh), Jagli Boro (256)(Mymensingh), Jagli (645)(Noakhali), Jagli (1704)(Faridpur), Jagli (1705)(Faridpur), Jagli (1761), Jagli (1806)(Kishorganj), Jagli (2253)(Kishorganj), Jagli Boro (3677)(Mymensingh), Jagli Boro (4521)(Sunamganj), Jagli Boro (4536)(Habiganj), Jagli (4553)(Netrakona) and 20 Kali Boro viz. Kali Boro (260)(Mymensingh), Kali Boro (735)(Comilla), Kali Boro (1281), Kali Boro (1707)(Faridpur), Kali Boro 2/2 (2189), Kali Boro 41/1 (2192), Kali Boro 80/3 (2194), Kali Boro 109/4 (2196), Kali Boro 139/2 (2198), Kali Boro-200 (2200), Kali Boro-259 (2201), Kali Boro-576 (2203), Kali Boro-600 (2204), Kali Boro-704 (2205), Boro 6/2 (2206), Boro 9/2 (2207), Boro 10/3 (2208), Boro 13/2 (2209), Boro 15/1 (2210), Kali Boro (4581)(Tangail) were grown under transplanted condition with four replications using single row of 5.4 m long each per entry and 45 days old single seedling per hill with a spacing of 25 cm × 20 cm between rows and plants, respectively. Fertilizers were applied @ 80:60:40 kg NPK/ha. Appropriate control measures for pest, disease, and weeds were taken whenever necessary. The data were collected from individual plant for seedling height (cm), days to 50% flowering, tillers/hill, panicles/hill, panicle length (cm), plant height (cm), 1000-grain weight (g), flag leaf area (cm²), grains/panicle, grain length (mm), harvest index, and grain yield/hill (g). Genetic diversity and sorting the duplication of accessions based on their morpho-agronomic characters were studied following Mahalanobis’s (1936) generalized distance (D) extended by Rao (1952). Clustering of genotypes was done according to Tocher’s method (Rao, 1970). All the statistical analyses were done by GENSTAT 5 and SPSS programme.

Source of Information: Bangladesh J. Agril. Res.2010. 35(1): 29-36.

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Significant variations were recorded among the accessions for all the characters except grains/panicle and harvest index. On the basis of D² values, the 36 genotypes were grouped into six clusters but no duplicate was found. Cluster I comprised the highest number of genotypes (10) and cluster II has the minimum number of entries (1) and the genotypes collected from similar ecological region were not in the same cluster. The inter and intra cluster distance varied of intra (0.00 to 1.78) and inter (1.99 to 21.20) distances. The highest mean value for seedling height (21.68 cm), 1000-grain weight (20.97 g), and grain yield/hill (6.87 g) were observed in cluster I, cluster II for days to 50% flowering (116), panicle length (22.80 cm), grains/panicle (74), and grain length (8.35 mm), IV for tillers/hill (16.44) and panicles/hil (14.17) etc. Finally, it can be concluded that all these Boro varieties are not duplicates in spite of having same name. Therefore, all the accessions need to be included in ‘core collection’ of conservational programme of germplasm in Genebank for total safeguarding of rice gene pool.

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