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Identification of New Sources of Submergence Tolerance Germplasm

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

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 the period from August 2011 to November 2011 to identify tolerant germplasm at the seedling stage under complete submergence condition. Ninety eight genotypes along with submergence tolerant check FR13A and susceptible check BR5 were tested at 70 cm water depth for 14 days. Among the tested genotypes, 9 genotypes namely Gabura (Acc. No.24), Boron(Acc. No.90), Boron(Acc. No.91), Dhaldata (Acc. No.92), Hashfal Boron (Acc. No.97), Dal katra (Acc. No.99), Hashful Raj ( Acc. No.113), Raj mondal (Acc. No.114), Luta (Acc. No.121) were found very good recovery status which survivability score 3.

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

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

Start Date: 01-07-2011

End Date: 30-06-2012

Program Area: Variety and Species

Commodity: Rice

Objectives:

To identify submergence tolerant donor at seedling stage

Methodology:

A total of 98 genotypes and 2 checks namely FR13A and BR5 were tested in this experiment. Direct seeded 25 days old seedling was submerged in the Plant Physiology submergence tank. Uniformly sprouted fourteen seeds of each genotype were seeded in 20 cmX20 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 recorded. 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 by SES. Recovery status was also evaluated 30 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, survivability was 100% but susceptible check BR5 didn’t survive well, and the survivability was 21%. Internodes elongation and dry matter production was increased for both varieties ranged from 12.8 to 65.4 and 31.3 to 81.8 respectively. Among the tested genotypes, 9 genotypes namely Gabura (Acc. No.24), Boron(Acc. No.90), Boron(Acc. No.91), Dhaldata(Acc. No.92), Hashfal Boron (Acc. No.97), Dal katra(Acc. No.99), Hashful Raj( Acc. No.113), Raj mondal(Acc. No.114), Luta (Acc. No.121), were found very good recovery status which survivability score 3, 28 genotypes were found good recovery status with survivability score 5, 35 genotypes were found fair recovery accompanying survivability score 7 and 26 genotypes were found poor recovery status which survivability score 9. From the results 37 genotypes should be considered for further study which recovery status was very good and good.

Knowledge Management: Report/Proceedings