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Screening for Salinity Tolerance of F2 Progenies at the Seedling Stage.

Rumena Yasmeen
Principal Scienticfic Officer
CSO and head (Additional charge) Plant Physiology Division BRRI, Gazipur-1701

Salma Akter
Scienticfic Officer
Plant Physiology Division BRRI, Gazipur-1701

Md. Sazzadur Rahman
Senior Scientific Officer
Plant Physiology Division BRRI, Gazipur-1701

Abstract/ Executive Summary:

The experiment was conducted to screen out salt tolerant genotypes at seedling stage. F₂ progenies of 47 crosses and 2 genotypes were screened at high saline condition using hydroponic system. Among them, only 6 progenies as ArmanSadar/ BR11// FL378// FL378, FL478/BRRI dhan50//BRRI dhan53, Ashfal Balam/BR23//FL478//BRRI dhan53, ArmanSadar/BR11//FL478//FL378, BRRI dhan53/FL478 and IR7894-B-Saltol-29-1 showed visual score 5 that is moderately tolerant. However, other genotypes showed visual score 7 to 9 that is susceptible to highly susceptible at high saline condition.

Keywords: F2 progenies, Salinity, Seedling stage

Location: Net house, Plant Physiology Division, BRRI, Gazipur

Start Date:

End Date:

Program Area: Variety and Species

Commodity: Rice

Objectives:

To identify salinity tolerant F₂ segregating progenies at seedling stage.

Methodology:

F₂ segregating progenies from 47 crosses and 2 advance lines along with tolerant and susceptible check were considered for this experiment. Sprouted seeds were sown on Nylon net fitted with Styro-foam floating on Yoshida full strength culture solution according to Gregorio et al., 1997. Salinity stress @ 12 dS/m was applied 7 days after sowing. The culture solution was changed once a week throughout the experimental period. The pH and EC of the culture solution was checked daily and maintained at 5.0 and 12 dS/m respectively. In each tray FL478 and IR29 were used as a tolerant and susceptible check, respectively. When susceptible check IR29 died, visual score was made according to SES system and living plants were recorded.

Source of Information: Proceedings of BRRI Annual Research Review Workshop for 2012-2013, BRRI, Gazipur-1701.

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Six (6) F₂progenies were identified as tolerant to moderately tolerant to salt stress at the seedling stage. These progenies could be used for future breeding program to develop tolerant variety.

Knowledge Management: Report/Proceedings