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Research Detail

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Dr. Md. Tariqul Islam
Principal Scientific Officer and Head
Crop Physiology Division, Bangladesh Institute of Nuclear Agriculture, Mymensingh-2202, Bangladesh

A pot experiment was carried out with aromatic rice genotypes to see the effect of temperature on grain growth pattern and to find out temperature tolerant genotypes. Five rice genotypes viz., BRRI dhan34, Ukunimadhu, RM-100-16, KD5-18-150 and Kalizira were used in this study. The experiment was laid out in randomized complete block design with three replications. Temperatures viz., Ambient and 30oC at flowering stage was imposed and continued until maturity. Grain dry weight and photosynthetic rate decreased but chlorophyll content of flag leaf was unaffected with temperature treatments. The highest grain dry weight, chlorophyll content and photosynthetic rate was found in the mutant KD5-18-150. Kalozira showed medium grain dry weight and photosynthetic rate. BRRI dhan34 had better grain dry weight and lower photosynthetic rate. The lowest grain dry weight was found in Ukunimadhu. The mutant RM-100-16 had lower grain dry weight and photosynthetic rate. Chlorophyll contents of all the genotypes were identical unlike KD5-18-150.

  Rice, Grain growth pattern, Temperature stress
  BINA, Mymensingh, Bangladesh
  00-07-2010
  00-12-2010
  Variety and Species
  Rice

To assess the effect of temperature on grain growth of rice genotypes and to find out temperature tolerant variety

A pot experiment was conducted with five aromatic rice genotypes viz., BRRI dhan34, Ukunimadhu, RM-100-16, KD5-18-150 and Kalizira during July to December 2010. The experiment was laid out in randomized complete block design with three replications. Thirty-day old seedlings were transplanted in plastic pots containing 8 kg soils pot-1 on 14 August 2010. Temperatures viz., Ambient and 30oC at flowering stage was imposed and continued until maturity. Grain dry weighs, chlorophyll content and photosynthetic rate of flag leaf were measured at 3 day's interval from fertilization to maturity. Data were statistically analyzed and Duncan's Multiple Range Test (DMRT) compared the means.

  BINA Annual Report, 2010-2011: page 69-70, Mymensingh, Bangladesh
  
Funding Source:
  

Photosynthetic rate of the rice genotypes decreased but chlorophyll content was unaffected with temperature treatment. The mutant KD5-18-150 showed the highest grain dry weight, chlorophyll content and photosynthetic rate. Chlorophyll contents of all the genotypes were identical unlike KD5-18-150.

  Report/Proceedings
  

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