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Research Detail

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Hasina Begum
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.

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

Dr. Sunil Kumar Biswas
Chief Scientific Officer
Grain Quality and Nutrition Division, BRRI, Gazipur-1701, Bangladesh.

Mohammad Zahidul Islam,
Scientific Officer
Genetic Resources and Seed Division, BRRI, Gazipur-1701, Bangladesh.

Armin Bhuiyan
Scientific Officer
Genetic Resources and Seed Division, BRRI, Gazipur-1701, Bangladesh.

In total 33 accessions, collected from BRRI were studied for genetic divergence through fifteen morpho-physiological characters. The genotypes were grouped into seven clusters based on Mahalonobis’ D2 clustering. The inter cluster distances in almost all of the cases were larger than the intra cluster distances indicating that wider diversity was present among the genotypes of distance clusters. The intra cluster distances ranged from 0.45 in cluster VI to 0.78 in cluster III. Regarding inter cluster distance, cluster I showed maximum genetic distance (15.29) from cluster II and cluster V showed minimum genetic distance (4.10) from cluster VII and could be used as parents in hybridization program for getting the highest transgressive segregation. The mean performance of seven clusters for fifteen characters showed that genotypes with maximum HI (0.17) and filled grain/panicle (173) were clubbed into cluster II, whereas the highest value of panicle length (29.97 cm), grain length (7.87 mm) and 1000 grain weight (20.86 g) were obtained from cluster IV. Cluster V contained the highest no. of panicle/hill (12.05) and yield/hill (12.11 g). Therefore, for getting maximum good characters, genotypes from these clusters can be used in hybridization program.

  Morphological characterization, Divergence, Aromatic rice, Bangladesh.
  BRRI, Gazipur.
  01-07-2008
  31-12-2008
  Conservation and Biodiversity
  Rice

To estimate genetic relationship and genetic distance among the varieties through evaluating morpho-physiological traits and grouping the varieties into cluster for selecting parents.

The experiment was conducted at BRRI farm, Gazipur in T. Aman season, 2008. A total of 33 accessions composed of 28 local aromatic viz. Kalgochi, Buchi, Maloti, Chini Sakkor (acc. no. 387), Chini Sakkor (acc. no. 388), Thakurbhog, Chini Kamini, Dak Shahi, Chini Kanai, Soru Kamini, Badsha Bhog Tapl-62, Kalijira Tapl-64, Kalijira Tapl-68, Kalijira Taple-74, Straw Tapl-500, Oval Tapl-600, Black Tapl-554, Badsha bohg (acc. no. 4355), Ukni Madhu, Absh Mot,  Kalijira (acc. no. 4755), Padmabhog, Kalijira (acc. no. 4814), Baoi Jhaki, Jira bogh,  Kalijira (acc. no. 4832), Dudsail, Guamuri and four modern aromatic varieties (BR5, BRRI dhan34, BRRI dhan37 and BRRI dhan38) along with Nizersail were grown. The germplasm were collected from BRRI Rice Genebank. For each entry, thirty-day-old single seedling per hill with a spacing of 20 X 20 cm between rows and plants, respectively were transplanted in 5 m x 2 m plot using randomized complete block design (RCBD) with three replications. Fertilizers were applied @ 80:60:40 Kg NPK/ha. Gap filling was done within one week of the transplanting. Proper management practices were carried out throughout the crop growth period including necessary control measures for keeping the crop free from weed, pests and diseases infestation. Fifteen morpho-agronomic and yield contributing data viz. seedling height (cm), plant height (cm), days to 50% flowering, days to maturity, number of panicle/hill, panicle length (cm), filled grains/panicle, unfilled grains/panicle, grain length (mm), grain breadth (mm), 1000 grain weight (g), flag leaf area (cm2), harvest index (%), yield/hill (g) and yield (t/ha) were recorded. Mahalonobis’ D2 and Canonical Vector Analysis methods were used to cluster the varieties using GENSTAT 5.13 program.

  Proceedings of the BRRI Annual Internal Review for 2008-2009, Genetic Resources and Seed Division, BRRI, Gazipur-1701.
  
Funding Source:
1.  Government Budget:  
  

Maximum 8 entries were grouped into the cluster VII, followed by 6 in cluster IV and 5 in cluster III and the lowest (2) by cluster V. Cluster II showed maximum genetic distance (15.29) from cluster I followed by cluster IV (14.81), cluster VI (13.91) and so on for most of the cases. The cluster I contained the shortest value of plant height (108.2 cm) and the highest values of no. of panicle/hill and unfilled grain/panicle. Similarly, cluster II produced the highest values of growth duration (145), filled grain/panicle (173) and HI (0.17); cluster III of seedling height (29.82 cm), flag leaf area (33.02) as well as higher yield/hill (11.31 g); cluster IV of panicle length (29.97 cm), grain length (7.87 mm), 1000 gw (20.86 g) and higher yield/hill (11.90 g); cluster V of no. of panicle/hill (12.05) and yield/hill (12.11 g) and cluster VII of plant height (131.31), respectively. Besides, cluster VI contained the plants of the shortest growth duration (139). Therefore, cluster II (Maloti, Oval Tapl-600, Black Tapl- 554, Absh Moti, Nizersail), cluster IV (Kalgochi, Buchi, Straw Tapl-500, Baoi Jhaki, Jirabhog, BRRI dhan38) and cluster V (Kalijira Tapl-68, Kalijira) can be used in hybridization program.

  Report/Proceedings
  


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