Abstract
For much of the past century, mutagenesis has gained popularity in plant genetics research as a means of inducing novel genetic variation. Induced mutations have been applied for the past 40 years to produce mutant cultivars in sunflower by changing plant characteristics that significantly increase plant yield and quality. The present study was focused on generating baseline data to elucidate the role of genotypic differences in the response of sunflower to induced mutagenesis with the aim of expanding the applicability of the use of induced mutant stocks in the genetic improvement of the crop and in its functional genomics. The strategy adopted was to estimate the optimal treatment conditions (doses of mutagens) through relating the extent of damage in seedling progeny to the exposure levels of the initiating propagules to mutagens. Seeds of 15 elite sunflower genotypes commonly used as breeding stocks and grown on commercial scales were treated with a range of mutagens: Gamma-rays (γ rays); fast neutrons and with ethyle-methane-sulphonate (EMS) at different treatment doses. The three mutagenic agents affected seedling height, reducing it with increasing dosage. Based on the mutagen damage on seedling height, the 50% and 30% damage indices (D50 and D30, respectively) were estimated for the 15 sunflower genotypes for the three mutagens. The D50 (D30) values for the sunflower lines ranged from 120 to 325Gy (5 to 207Gy) for gamma irradiation; 9 to 21Gy (0.1 to 10Gy) for fast neutrons and 0.69 to 1.55% (0.01 to 0.68%) concentration of EMS.
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Claims 9
Claim · model-written summary
Gamma rays reduced sunflower seedling height as dose increased.
- Taxon
- sunflower
Helianthus annuust0 - Treatment
- Gamma-rays (γ rays)e1
- Outcome
- seedling heighte0
- Direction
- reducinge0
- Qualifier
- increasing dosagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The three mutagenic agents affected seedling height, reducing it with increasing dosage.”
e1“Gamma-rays (γ rays); fast neutrons and with ethyle-methane-sulphonate (EMS) at different treatment doses”
t0“sunflower”
Claim · model-written summary
Fast neutrons reduced sunflower seedling height as dose increased.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- fast neutronse1
- Outcome
- seedling heighte0
- Direction
- reducinge0
- Qualifier
- increasing dosagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The three mutagenic agents affected seedling height, reducing it with increasing dosage.”
e1“Gamma-rays (γ rays); fast neutrons and with ethyle-methane-sulphonate (EMS) at different treatment doses”
t0“sunflower”
Claim · model-written summary
EMS reduced sunflower seedling height as dose increased.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- ethyle-methane-sulphonate (EMS)e1
- Outcome
- seedling heighte0
- Direction
- reducinge0
- Qualifier
- increasing dosagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The three mutagenic agents affected seedling height, reducing it with increasing dosage.”
e1“Gamma-rays (γ rays); fast neutrons and with ethyle-methane-sulphonate (EMS) at different treatment doses”
t0“sunflower”
Claim · model-written summary
Gamma irradiation D50 ranged from 120 to 325Gy among sunflower lines.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- gamma irradiatione0
- Outcome
- D50e0
- Direction
- rangede0
- Value
- 120 to 325Gye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The D50 (D30) values for the sunflower lines ranged from 120 to 325Gy (5 to 207Gy) for gamma irradiation”
t0“sunflower”
Claim · model-written summary
Gamma irradiation D30 ranged from 5 to 207Gy.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- gamma irradiatione0
- Outcome
- D30e0
- Direction
- rangede0
- Value
- 5 to 207Gye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The D50 (D30) values for the sunflower lines ranged from 120 to 325Gy (5 to 207Gy) for gamma irradiation”
t0“sunflower”
Claim · model-written summary
Fast-neutron D50 ranged from 9 to 21Gy.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- fast neutronse0
- Outcome
- D50e1
- Value
- 9 to 21Gye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“9 to 21Gy (0.1 to 10Gy) for fast neutrons”
e1“The D50 (D30) values for the sunflower lines ranged from 120 to 325Gy (5 to 207Gy) for gamma irradiation”
t0“sunflower”
Claim · model-written summary
Fast-neutron D30 ranged from 0.1 to 10Gy.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- fast neutronse0
- Outcome
- D30e1
- Value
- 0.1 to 10Gye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“9 to 21Gy (0.1 to 10Gy) for fast neutrons”
e1“The D50 (D30) values for the sunflower lines ranged from 120 to 325Gy (5 to 207Gy) for gamma irradiation”
t0“sunflower”
Claim · model-written summary
EMS D50 ranged from 0.69 to 1.55%.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- EMSe0
- Outcome
- D50e1
- Value
- 0.69 to 1.55%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“0.69 to 1.55% (0.01 to 0.68%) concentration of EMS”
e1“The D50 (D30) values for the sunflower lines ranged from 120 to 325Gy (5 to 207Gy) for gamma irradiation”
t0“sunflower”
Claim · model-written summary
EMS D30 ranged from 0.01 to 0.68%.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- EMSe0
- Outcome
- D30e1
- Value
- 0.01 to 0.68%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“0.69 to 1.55% (0.01 to 0.68%) concentration of EMS”
e1“The D50 (D30) values for the sunflower lines ranged from 120 to 325Gy (5 to 207Gy) for gamma irradiation”
t0“sunflower”
The same questions in other papers
ethyl methanesulfonate · growth · Helianthus annuus (common sunflower)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- negative
radiation · growth · Helianthus annuus (common sunflower)Positive and negative results
10 papers in the same direction as this paper · 8 in the opposite direction
- no effect
- positive
- positive
15 papers more in this group
See all 19 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.