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Characterization of Rice Germplasm for Identifying New Sources of Submergence Tolerance

H.N. Barman
Senior Scientific Officer
Plant Physiology Division, Bangladesh Rice Research Institute, Gazipur-1701

Dr. R. Yasmeen
Principal Scientific Officer
Plant Physiology Division, Bangladesh Rice Research Institute, Gazipur-1701

Dr. J. K. Biswas
Director (Admin and common service)
Bangladesh Rice Research Institute, Gazipur-1701

Dr. K. M. Iftekharudaula
Principal Scientific Officer
Plant Breeding Division, Bangladesh Rice Research Institute, Gazipur-1701

Dr. M. Khalequzzaman
Chief Scientific Officer
Genetic Resources and Seed Division, Bangladesh Rice Research Institute, Gazipur-1701

Abstract/ Executive Summary:

The experiment was conducted during 2011, to observe visual score and survivability of rice germplasm at the seedling stage under complete submergence condition. Some total of 102 local germplasm including tolerant and susceptible check were tested at 70 cm water depth for 14 days. Among the genotypes 25 genotypes were found better which survivability ranges from 92-100% and survivability score 3.

Keywords: Submergence, Rice, Germplasm, Donor,Tolerance, Survivability and Recovery.

Location: Plant Physiology Division,Bangladesh Rice Research Institute Gazipur-1701

Start Date: 01-07-2011

End Date: 30-06-2012

Program Area: Variety and Species

Commodity: Rice

Objectives:

To identify new submergence tolerant donor.

Methodology:

A total 100 genotypes and 2 checks namely FR13A and BR5 were evaluated in this experiment. Direct seeded 25 days old seedling was submerged in the Plant Physiology submergence tank. Uniformly sprouted twenty four seeds of each genotype were seeded using 1 seed/hill and 20 cm X 20 cm spacing and 2 rows were maintained for each genotype. At 25 days after seeding, the crop was allowed to complete submergence maintaining 70 cm water depth for 14 days. During submergence period, the water of the tank was made turbid twice daily and the light intensity in upper level (normal), mid level (30 cm below the water surface) and lower level (70 cm below the water surface) of the tank water were measured through light meter (LI-250). The water pH and temperature were also measured. At 14 days after submergence, the water drained out from the submergence tank. The survival data was taken at 5 days after de-submergence. Survival scoring was done according to SES. Recovery status was not evaluated because all plants had died due to lodging and low temperature after 15 days of de-submergence. The scoring system for screening at seedling stage was as follows: Score Criteria 1 Plant erect, green, none or slight elongation. 3 Plant elongated, bent at the middle and pale in colour. 5 Plant erect, green, elongated considerably. 7 Plant very much elongated and lodged. 9 Plant very much elongated and apparently dead.

Source of Information: Proceedings of the BRRI Annual Internal Research Review, 2011-2012

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Tolerant check FR13A survived successfully which was 100% but susceptible check BR5 didn’t survived well which was only 42%. The % elongation was ranges from 17.5 to 55.1. Among the genotypes 25 genotypes were found better which survivability ranges from 92-100% and survivability score 3. Further evaluation would be needed due to damage before recovery. Submergence tolerance and survivability of the tested genotypes Sl. Acc. No. No. Designation % Elongation % Survivability Score Seedling weight (gm) before submergence 1 217 Lao Bhug 31.1 100 3 0.20 2 230 Khirloni 31.8 100 3 0.12 3 237 Dudrat 30.8 92 3 0.20 4 248 Telot 22.8 100 3 0.12 5 250 Joli Amon 22.4 100 3 0.12 6 252 Bazail 28.5 100 3 0.12 7 412 Chcmgul 29.9 96 3 0.20 8 416 Jingh Sail (2) 28.9 96 3 0.20 9 440 Raisa phul 31.9 100 3 0.20 10 444 Tangul 30.0 96 3 0.20 11 449 Bawai jhaki 30.2 100 3 0.12 12 450 Bas Kolom 21.9 96 3 0.20 13 451 Dola Goeha 26.9 100 3 0.12 14 453 Kali Bunni 30.9 100 3 0.12 15 454 Kolom Depa 23.5 100 3 0.12 16 456 Kolom 31.8 100 3 0.12 17 457 Babu Sail 28.6 92 3 0.20 18 458 Buta Sail 25.4 96 3 0.20 19 459 Mohon Bhog 23.0 96 3 0.20 20 460 Pengun 31.3 96 3 0.20 21 462 Beto 18.4 100 3 0.20 22 463 Ronjoy 25.0 96 3 0.20 23 465 Hash Raj 29.3 100 3 0.12 24 466 Bash phul 27.8 100 3 0.12 25 467 Guta Balam 29.6 100 3 0.12 26 FR13A 17.5 100 1 0.12 (Tolerant check) 27 BR5 45.0 42 9 0.14 (Susceptible check)

Knowledge Management: Report/Proceedings