Abstract
Development of rice varieties using induced mutation has seldom been applied in Sri Lanka. This study was carried out to determine the effect of gamma irradiation doses on seed germination and different plant growth parameters of three rice varieties in Sri Lanka. Two hundred grams of seeds of three rice varieties (Bg 94–1, Bg 1165–6, Suwandal) were irradiated varying doses of 200, 300 and 400 Gy using 60Co Gamma Cell Irradiator facility at the International Atomic Energy Agency (IAEA) laboratories Seibersdorf, Austria. The experiment was designed as split plot with three replications and conducted at the plant house of Rice Research and Development Institute, Batalagoda. The effects of gamma irradiation on seed germination and different plant growth parameters were evaluated (radio sensitivity testing). With the increase in gamma doses, seed germination, seedling emergence, seedling height, root length, and plant survival in the field were declined. Significant (P<0.05) differences were observed between different varieties in seedling height, root length and percentage of field survival. Gamma irradiation showed significant (P<0.05) negative correlation with seed germination (–0.52), seedling emergence (–0.54), seedling height (–0.54), root length (–0.50) and field survival (–0.42). Percentage of survival in the field was the least affected while the percentage reduction was 8.56. The most efficient and optimum dose to induce rice mutation of the varieties under investigation is within the range of 200 – 300 Gy. More pronounced adverse effect was observed for all the growth characters at the highest dose in all three varieties. Increasing doses above 400 Gy caused severe morphological damages to the rice plants and increased doses of gamma irradiation have a negative correlation with germination and other parameters of plant growth. A comprehensive study should be carried out to determine the optimum doses for different rice varieties that could be useful in rice varietal improvement programmes in Sri Lanka.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-sa. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 13
Claim · model-written summary
Increasing gamma doses decreased seed germination, seedling emergence and seedling height of rice.
- Taxon
- rice
Oryza sativae2 - Treatment
- gamma dosese1
- Outcome
- seed germination, seedling emergence, seedling heighte1
- Direction
- were declinede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“With the increase in gamma doses, seed germination, seedling emergence, seedling height, root length, and plant survival in the field were declined”
e2“Two hundred grams of seeds of three rice varieties”
Claim · model-written summary
Increasing gamma doses decreased root length of rice.
- Taxon
- riceOryza sativae2
- Treatment
- gamma dosese1
- Outcome
- root lengthe1
- Direction
- were declinede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“With the increase in gamma doses, seed germination, seedling emergence, seedling height, root length, and plant survival in the field were declined”
e2“Two hundred grams of seeds of three rice varieties”
Claim · model-written summary
Percentage of field survival of rice was the least affected by gamma irradiation, with a reduction of 8.56.
- Taxon
- riceOryza sativae2
- Treatment
- gamma dosese1
- Outcome
- percentage of survival in the fielde6
- Direction
- least affectede6
- Value
- 8.56e6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“With the increase in gamma doses, seed germination, seedling emergence, seedling height, root length, and plant survival in the field were declined”
e2“Two hundred grams of seeds of three rice varieties”
e6“Percentage of survival in the field was the least affected while the percentage reduction was 8.56”
Claim · model-written summary
Significant differences in seedling height, root length and field survival were observed between rice varieties.
- Taxon
- riceOryza sativae2
- Material
- different varietiese4
- Outcome
- seedling height, root length and percentage of field survivale4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Two hundred grams of seeds of three rice varieties”
e4“Significant (P<0.05) differences were observed between different varieties in seedling height, root length and percentage of field survival”
Claim · model-written summary
Gamma irradiation had a significant negative correlation with seed germination (r = -0.52).
- Taxon
- riceOryza sativae2
- Treatment
- Gamma irradiatione5
- Outcome
- seed germinatione5
- Direction
- negative correlatione5
- Value
- –0.52e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Two hundred grams of seeds of three rice varieties”
e5“Gamma irradiation showed significant (P<0.05) negative correlation with seed germination (–0.52), seedling emergence (–0.54), seedling height (–0.54), root length (–0.50) and field survival (–0.42)”
Claim · model-written summary
Gamma irradiation had a significant negative correlation with seedling emergence (r = -0.54).
- Taxon
- riceOryza sativae2
- Treatment
- Gamma irradiatione5
- Outcome
- seedling emergencee5
- Direction
- negative correlatione5
- Value
- –0.54e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Two hundred grams of seeds of three rice varieties”
e5“Gamma irradiation showed significant (P<0.05) negative correlation with seed germination (–0.52), seedling emergence (–0.54), seedling height (–0.54), root length (–0.50) and field survival (–0.42)”
Claim · model-written summary
Gamma irradiation had a significant negative correlation with seedling height (r = -0.54).
- Taxon
- riceOryza sativae2
- Treatment
- Gamma irradiatione5
- Outcome
- seedling heighte5
- Direction
- negative correlatione5
- Value
- –0.54e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Two hundred grams of seeds of three rice varieties”
e5“Gamma irradiation showed significant (P<0.05) negative correlation with seed germination (–0.52), seedling emergence (–0.54), seedling height (–0.54), root length (–0.50) and field survival (–0.42)”
Claim · model-written summary
Gamma irradiation had a significant negative correlation with root length (r = -0.50).
- Taxon
- riceOryza sativae2
- Treatment
- Gamma irradiatione5
- Outcome
- root lengthe5
- Direction
- negative correlatione5
- Value
- –0.50e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Two hundred grams of seeds of three rice varieties”
e5“Gamma irradiation showed significant (P<0.05) negative correlation with seed germination (–0.52), seedling emergence (–0.54), seedling height (–0.54), root length (–0.50) and field survival (–0.42)”
Claim · model-written summary
Gamma irradiation had a significant negative correlation with field survival (r = -0.42).
- Taxon
- riceOryza sativae2
- Treatment
- Gamma irradiatione5
- Outcome
- field survivale5
- Direction
- negative correlatione5
- Value
- –0.42e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Two hundred grams of seeds of three rice varieties”
e5“Gamma irradiation showed significant (P<0.05) negative correlation with seed germination (–0.52), seedling emergence (–0.54), seedling height (–0.54), root length (–0.50) and field survival (–0.42)”
Claim · model-written summary
The most efficient and optimum gamma dose to induce rice mutation is within 200 – 300 Gy.
- Taxon
- riceOryza sativae7
- Outcome
- optimum dose to induce rice mutatione7
- Value
- 200 – 300 Gye7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“The most efficient and optimum dose to induce rice mutation of the varieties under investigation is within the range of 200 – 300 Gy”
Claim · model-written summary
The highest gamma dose caused a more pronounced adverse effect on growth characters in all three rice varieties.
- Taxon
- riceOryza sativae2
- Treatment
- highest dosee0
- Outcome
- growth characterse0
- Direction
- More pronounced adverse effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Two hundred grams of seeds of three rice varieties”
e0“More pronounced adverse effect was observed for all the growth characters at the highest dose in all three varieties”
Claim · model-written summary
Gamma doses above 400 Gy caused severe morphological damage to rice plants.
- Taxon
- riceOryza sativae1
- Treatment
- Increasing doses above 400 Gye1
- Outcome
- morphological damagese1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Increasing doses above 400 Gy caused severe morphological damages to the rice plants”
Claim · model-written summary
A comprehensive study is needed to determine optimum gamma doses for different rice varieties in Sri Lankan varietal improvement.
- Taxon
- riceOryza sativae0
- Outcome
- optimum doses for different rice varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A comprehensive study should be carried out to determine the optimum doses for different rice varieties”
The same questions in other papers
radiation · growth · Oryza sativa (rice)Results differ
61 papers in the same direction as this paper · 22 in the opposite direction
- negative
- no effect
- positive
80 papers more in this group
See all 84 papers →radiation · survival · Oryza sativa (rice)Positive and negative results
5 papers in the same direction as this paper · 3 in the opposite direction
- negative
- positive
- positive
5 papers more in this group
See all 9 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.