Abstract
From 5136 M1 spike progenies, raised from gamma-ray irradiations and EI treatments on dormant seeds of a six-rowed barley varlety "Chlkurin lbaraki No. 1" (EXp. SD 66) and a semidwarf mutant derived from the variety (Exp. SD 68), a total of 146 progenies which segregated for sterile mutants were isolated. In Exp. SD 66, the frequency of mutated M1 spike progenies increased with the increased dose from O.5 to 2.0% for gamma-rays and from 1.5 to 6.2% for EI. In Exp. SD 68, the dose response of the frequency was similar to that in Exp. SD 66. Relative efiiciency for induction of sterile mutation to chlorophyl mutation was quite different between gamma-rays and EI. In gamma-ray irradiation the mutation rate on M2 plant basis was one sixth of the chlorophyl mutation rate through the doses applied and years of experiment. In EI treatment, the ratio was one third, as illustrated clearly in Fig.1, indicating that EI treatment was relatively two times more effective for induction of sterile mutation than gamma-ray irradiation.
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Claims 7
Claim · model-written summary
A total of 146 barley progenies segregating for sterile mutants were isolated.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaree6 - Outcome
- progenies which segregated for sterile mutantse0
- Value
- 146e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e6“dormant seeds of a six-rowed barley”
e0“a total of 146 progenies which segregated for sterile mutants were isolated”
Claim · model-written summary
Frequency of mutated M1 spike progenies increased with dose for gamma-ray irradiation, from O.5 to 2.0%.
- Taxon
- barleyHordeum vulgaree6
- Treatment
- gamma-rayse1
- Outcome
- frequency of mutated M1 spike progeniese1
- Direction
- increasede1
- Value
- from O.5 to 2.0%e1
- Qualifier
- the increased dosee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“dormant seeds of a six-rowed barley”
e1“In Exp. SD 66, the frequency of mutated M1 spike progenies increased with the increased dose from O.5 to 2.0% for gamma-rays and from 1.5 to 6.2% for EI”
Claim · model-written summary
Frequency of mutated M1 spike progenies increased with dose for EI treatment, from 1.5 to 6.2%.
- Taxon
- barleyHordeum vulgaree6
- Treatment
- EIe1
- Outcome
- frequency of mutated M1 spike progeniese1
- Direction
- increasede1
- Value
- from 1.5 to 6.2%e1
- Qualifier
- the increased dosee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“dormant seeds of a six-rowed barley”
e1“In Exp. SD 66, the frequency of mutated M1 spike progenies increased with the increased dose from O.5 to 2.0% for gamma-rays and from 1.5 to 6.2% for EI”
Claim · model-written summary
The dose response of mutation frequency in Exp. SD 68 was similar to that in Exp. SD 66.
- Taxon
- barleyHordeum vulgaree6
- Outcome
- dose response of the frequencye2
- Direction
- similare2
- Comparator
- Exp. SD 66e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“dormant seeds of a six-rowed barley”
e2“In Exp. SD 68, the dose response of the frequency was similar to that in Exp. SD 66”
Claim · model-written summary
For gamma-ray irradiation, the sterile-mutation rate on an M2 plant basis was one sixth of the chlorophyll mutation rate.
- Taxon
- barleyHordeum vulgaree6
- Treatment
- gamma-ray irradiatione3
- Outcome
- mutation rate on M2 plant basise3
- Value
- one sixthe3
- Comparator
- chlorophyl mutation ratee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“dormant seeds of a six-rowed barley”
e3“In gamma-ray irradiation the mutation rate on M2 plant basis was one sixth of the chlorophyl mutation rate through the doses applied and years of experiment”
Claim · model-written summary
For EI treatment, the sterile-mutation to chlorophyll-mutation ratio was one third.
- Taxon
- barleyHordeum vulgaree6
- Treatment
- EI treatmente4
- Outcome
- the ratioe4
- Value
- one thirde4
- Comparator
- chlorophyl mutation ratee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“dormant seeds of a six-rowed barley”
e3“In gamma-ray irradiation the mutation rate on M2 plant basis was one sixth of the chlorophyl mutation rate through the doses applied and years of experiment”
e4“In EI treatment, the ratio was one third”
Claim · model-written summary
EI treatment was about two times more effective than gamma-ray irradiation at inducing sterile mutation in barley.
- Taxon
- barleyHordeum vulgaree6
- Treatment
- EI treatmente5
- Outcome
- induction of sterile mutatione5
- Direction
- more effectivee5
- Value
- two timese5
- Comparator
- gamma-ray irradiatione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“dormant seeds of a six-rowed barley”
e5“indicating that EI treatment was relatively two times more effective for induction of sterile mutation than gamma-ray irradiation”
The same questions in other papers
radiation · yield · Hordeum vulgare (barley)Positive and negative results
8 papers in the same direction as this paper · 3 in the opposite direction
- negative
- no effect
- negative
8 papers more in this group
See all 12 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.