Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Characterization of Local Aman Rice Germplasm Grown at Waterlogged Situation in Southwest Bangladesh Against Salinity and Submergence

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

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

Dr. M. S. Islam,
Principal Scientific Officer and Head,
Plant Physiology Division, BRRI, Gazipur-1701, Bangladesh.

Dr. M. K. Bashar,
Principal Scientific Officer and Head,
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.

Abstract/ Executive Summary:

Once more than thousand of indigenous rice varieties were available in southwest of Bangladesh. But at present rice diversity is threatened in Bangladesh in general and southwest Bangladesh in particular. Under this circumstance, the present study was undertaken for characterization of local Aman rice germplasrn grown at waterlogged situation of southwest Bangladesh against salinity and submergence. From screening salinity of the germplasm, it was found that Jamainadu, Ashful and Horkoch showed tolerance level similar to Pokkali. The salt tolerance level of Jamainadu was the highest among the traditional varieties. Similarly, screening submergence tolerance, the performance of Kachra was found moderately comparable to FR13A as tolerant submergence variety. From the passport data it was also found that Jamainadu, Ashlul, Horkoch and Kachra were popular saline and submergence tolerant varieties, respectively and well suited even up to 180 cm flooding condition. Moreover, the highest and the lowest amylose and protein content percentage among the studied germplasm were reported as Ashful (28.6 and 10.3) and Chinikanai (23.8 and 8.3), respectively. Finally, it can be concluded that tolerance levels against salinity and submergence of the germplasm grown at waterlogged situation of southwest Bangladesh are fair enough so as to make them available as parent material(s) in breeding programs for developing HYV rice varieties with diversified traits along with maintaining rice diversity.

Keywords: Screening, Aman germplasm, Salinity, Submergence

Location: BRRI, Gazipur.

Start Date: 00-00-2004

End Date: 00-00-2004

Program Area: Variety and Species

Commodity: Rice

Objectives:

To characterize popular local Aman rice germplasm grown at waterlogged situation of southwest Bangladesh

Methodology:

Screening for salinity: An experiment was conducted at net house, BRRI during 2004 with four most popular traditional salinity tolerant Aman varieties viz. Horkoch, Ashful, Chinikanai and Jamainadu, collected from southwest of Bangladesh under Rice Diversity and Evaluation sub project of PETRRA (Poverty Elimination Through Rice Research Assistance) project of BRRI during Aman 2002 and Aman 2003 seasons along with one sensitive variety as BRRI dhan29 and one tolerant check as Pokkali to evaluate their salt tolerance. For screening salinity tolerance, the pre-germinated seeds (10 for each line) were sown on the line of Styrofoam sheet floating in 12 lines trays containing Yoshida’s culture solution (Yoshida et. al., 1976).Styrofoam sheet contains a total of 10 lines with two check varieties in the middle 5 and 6th lines. At 12 days after sowing, NaCl applied on the screen trays to achieve the electrical conductivity (EC) at 6 dS/m of the culture solution. Then the EC of the culture solution was increased 2 dS/m in every 2 days and it was stopped when EC of the culture solution reached at 12 dS/m. After 7 days, the EC increased at 15 dS/m and maintained that level up to 30 days. The culture solution was changed once a week throughout the experimental period. The pH and EC of the culture solution was checked daily and adjusted at 5.00 & 15.00 respectively. The salinity was evaluated according to Standard Evaluation System of IRRI (Gregorio et al., 1997). When the sensitive check scored 9 then all the seedlings from each line were marked and scored. Besides, there was control treatment (0 NaCI) in the experiment. Percentage of survival, percentage of leaf area affected, percentage of shoot and root length reduction were measured and after oven drying (70°C for 72 hrs) the percentage of shoot and root dry weight reduction were measured and sodium to potassium ratio in shoot and root were estimated.

Screening for submergence: Similarly, another experiment was conducted at deep water experimental tank, BRRI during 2004 with only one most popular submergence tolerant local transplant Anion variety namely, Kachra collected from southwest of Bangladesh under Rice Diversity and Evaluation sub project of PETRRA (Poverty Elimination Through Rice Research Assistance) project of BRRI during Aman 2002 and Aman 2003 seasons along with one susceptible check as BR5 and one tolerant check as FR13A for determining submergence tolerance The sprouted seeds were sown in lines in steel trays containing puddle soil mixed with Urea, TSP, NIP and Gypsum @5-2-2-2 g /tray. At 25 days of seedling age, the plants were submerged in 70 cm deep turbid water for 10 days. After drainage of water, the plants were allowed to recover. Submergence tolerance score (after 5 days of drainage), survival % (after 15 days of drainage), recovery score (after 21 days of drainage) and number of plants with height (cm) (after 70 days of drainage) were then recorded.

Source of Information: Intl. J. BioRes. 5 (2): 17-21. 2008.

Article Link (Online Journal):

Funding Source:

1. Government	Budget:
2.	Budget:

Total Budget (Tk.) :

Achievement/Findings:

Tolerant check Pokkali and two traditional varieties Ashlul and Jamainadu survived well (90-80%) and BRRI dhan29 (5.7%). Moreover at 12 dS/m, leaf area reduction was 16% in Pokkali, and 23.3 and 26.7% in Jamainadu and Ashful. The reduction of shoot and root lengths in tolerant check were 7.7 and 28.6% and Jamainadu showed lower reduction (9.0 and 13.7%, respectively) as well as Ashful (6.8 and 19.3, respectively). Pokkali showed shoot and root dry weight reduction of 23.0 and 38.9%, as Jamainadu (34.5 and 30.7) and Ashful (14.0 and 39.8).
At 12 dS/m, Na/K ratio in shoot and root of Pokkali were 1.03 and 2.56, and that of Jamainadu (0.81) and Ashful (0.91) were even lower in shoot and nearly similar in Jamainadu (2.64) and lower in Ashful (2.32) in root. Therefore, Jarnainadu, Ashful and Horkoch showed tolerance level similar to Pokkali.Kachra was screened using FR13A as tolerant and BR5 as susceptible submergence variety. Kachra had the tolerance score of 5 whereas it were 1 and 9 for FR13A and BR5. Kachra showed similar survival percentage (100) as FR13A. In addition, Kachra also showed the fair recovery at post submergence period with plant height of 79.0 cm similar to FR13A (84.0 cm). Therefore, Kachra was moderately comparable to FR13A.

Knowledge Management: Journal