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Screening for Salinity Tolerance at the Seedling Stage of Rice Genotype, Boro 2010- 2011

Dr. Rumena 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

Abstract/ Executive Summary:

A study was conducted to observe the visual score and survivability of rice genotype at the seedling stage under high salinity stress in plant Physiology net house at Bangladesh Rice Research Institute during the Boro season. Out of 34 breeding lines, 9 lines namely IR77674-3B-8-2-2-14-2-AJY3, IR77674-3B-8-2-2-14-2-AJY4, IR7806-B-B-16-1-2-2-AJY1, IR59418-7B-21-3, IR74095-AC45, TCCP266-1-3B-10-2-1, IR69997-AC2, IR72579-B-3-2-3-3 and BR7105-4R-2 are found tolerant to moderately tolerant to saline conditions. Rest of the genotype showed susceptible to highly susceptible (Score 7-9).

Keywords: Salinity, Rice, Tolerance to salt, Visual score, Survivability etc.

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

Start Date: 01-07-2010

End Date: 30-06-2011

Program Area: Variety and Species

Commodity: Rice

Objectives:

To observe the visual score and survivability of rice genotype at the seedling stage under high salinity stress.

Methodology:

Pregerminated seeds were sown on nylon net fitted with styrofoam floating on Yoshida's full strength culture solution. After 3 days of sowing the seeds the solution was salinized upto 6 dS/m. The salinity raised upto 12 dS/m by increasing 2 dS/m every alternate day. In each tray FL478 and BRRI dhan29 were used as a tolerant and susceptible check, respectively. Visual score was made according to SES and alive plants were counted as soon as BRRI dhan29 started dying.

Source of Information: Proceedings of BRRI Annual Internal Review for 2010-2011)

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Considering visual score and survivality among thirty two genotypes eleven (11) genotype showed tolerant to moderately tolerant (score 3-5) at the seedling stage of rice under high (12ds/m) salinity stress. Rest of the genotype showed susceptible to highly susceptible (score 7-9). BRRI dhan55 is moderately tolerant to salinity. In contrast BRRI dhan28-Saltol introgressed with a Saltol QTL failed to prove its tolerance. Vis-a-vis BRRI dhan53, a variety already have been released as T.Aman for the salinity prone area could not prove its efficiency as saline tolerant one in the screening study. However, the previous result of this genotypes were the same as it has shown in the present study.

Knowledge Management: Report/Proceedings