Abstract
Drought stress is a major constraint to the production and yield stability of crops. Rice (Oryza sativa L.) is considered as a drought-sensitive crop species. Within this species, there are considerable varietal differences in sensitivity to this environmental stress. An experiment was conducted at the laboratory of the Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Bangladesh during April to September 2016 to evaluate 100 rice genotypes for drought tolerance during germination and early seedling growth stage. The genotypes were tested against five levels of drought stress imposed by Polyethylene glycol 6000 (PEG-6000) @ 0, 5, 10, 15 and 20%. The experiment was laid out in a complete randomized design with four replications. The results showed that with increasing water stress, germination in all the genotypes decreased from 95.8% in control to 6.6 % in highest stress (20% PEG) level. Seedling height and dry weight also decreased in all rice genotypes with the increase in water stress level. Based on Standard Evaluation System (SES),18 genotypes were selected primarily. Among the 18 genotypes, Ratoil and Chinisakkar showed higher germination index, relative seedling height and relative seedling dry weight than the check drought tolerant BRRI dhan43 at 20% PEG. Beside these, performance of Kumridhan, Pusur and Somondori was also well at this level compared to BRRI dhan43. The genotypes Ratoil, Chinisakkar, Kumridhan, Pusur and Somondori showed the best performance under drought condition. The Agriculturists 2018; 16(1) 44-54
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Claims 9
Claim · model-written summary
Germination fell from 95.8% in controls to 6.6% at 20% PEG.
- Taxon
- Rice
Oryza sativat0 - Treatment
- 20% PEGe0
- Outcome
- germinatione0
- Direction
- decreasede0
- Value
- 6.6 %e0
- Qualifier
- 95.8%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with increasing water stress, germination in all the genotypes decreased from 95.8% in control to 6.6 % in highest stress (20% PEG) level”
t0“Rice (Oryza sativa L.)”
Claim · model-written summary
Seedling height decreased as water stress increased.
- Taxon
- RiceOryza sativat0
- Treatment
- water stress levele0
- Outcome
- Seedling heighte0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedling height and dry weight also decreased in all rice genotypes with the increase in water stress level.”
t0“Rice (Oryza sativa L.)”
Claim · model-written summary
Seedling dry weight decreased as water stress increased.
- Taxon
- RiceOryza sativat0
- Treatment
- water stress levele0
- Outcome
- dry weighte0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedling height and dry weight also decreased in all rice genotypes with the increase in water stress level.”
t0“Rice (Oryza sativa L.)”
Claim · model-written summary
Eighteen genotypes were initially selected by SES.
Verbatim
e0“Based on Standard Evaluation System (SES),18 genotypes were selected primarily.”
Claim · model-written summary
Ratoil exceeded BRRI dhan43 in germination index, relative height and dry weight at 20% PEG.
- Taxon
- RiceOryza sativat0
- Material
- Ratoile0
- Treatment
- 20% PEGe0
- Outcome
- germination index, relative seedling height and relative seedling dry weighte0
- Direction
- highere0
- Comparator
- BRRI dhan43e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among the 18 genotypes, Ratoil and Chinisakkar showed higher germination index, relative seedling height and relative seedling dry weight than the check drought tolerant BRRI dhan43 at 20% PEG.”
t0“Rice (Oryza sativa L.)”
Claim · model-written summary
Chinisakkar exceeded BRRI dhan43 in germination index, relative height and dry weight at 20% PEG.
- Taxon
- RiceOryza sativat0
- Material
- Chinisakkare0
- Treatment
- 20% PEGe0
- Outcome
- germination index, relative seedling height and relative seedling dry weighte0
- Direction
- highere0
- Comparator
- BRRI dhan43e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among the 18 genotypes, Ratoil and Chinisakkar showed higher germination index, relative seedling height and relative seedling dry weight than the check drought tolerant BRRI dhan43 at 20% PEG.”
t0“Rice (Oryza sativa L.)”
Claim · model-written summary
Kumridhan performed well compared with BRRI dhan43 at 20% PEG.
- Taxon
- RiceOryza sativat0
- Material
- Kumridhane0
- Outcome
- performancee0
- Comparator
- BRRI dhan43e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“performance of Kumridhan, Pusur and Somondori was also well at this level compared to BRRI dhan43.”
t0“Rice (Oryza sativa L.)”
Claim · model-written summary
Pusur performed well compared with BRRI dhan43 at 20% PEG.
- Taxon
- RiceOryza sativat0
- Material
- Pusure0
- Outcome
- performancee0
- Comparator
- BRRI dhan43e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“performance of Kumridhan, Pusur and Somondori was also well at this level compared to BRRI dhan43.”
t0“Rice (Oryza sativa L.)”
Claim · model-written summary
Somondori performed well compared with BRRI dhan43 at 20% PEG.
- Taxon
- RiceOryza sativat0
- Material
- Somondorie0
- Outcome
- performancee0
- Comparator
- BRRI dhan43e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“performance of Kumridhan, Pusur and Somondori was also well at this level compared to BRRI dhan43.”
t0“Rice (Oryza sativa L.)”
The same questions in other papers
drought · growth · Oryza sativa (rice)Positive and negative results
183 papers in the same direction as this paper · 98 in the opposite direction
- positive
- negative
- negative
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See all 282 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.