Claim · model-written summary
The frequency of mutants in seed fertility was clearly decreased by heat shock after irradiation in rice.
- Taxon
- Rice
Oryza sativat0 - Treatment
- the heat-shock treatmente4
- Outcome
- frequency of mutants in seed fertilitye6
- Direction
- decreasede6
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Higher dose irradiation followed by the heat-shock treatment brought about a marked increase of the obtainable highest mutation frequency in three quantitative characters, heading date, culm length and panicle length”
e6“the frequency of mutants in seed fertility was clearly decreased”
t0“Rice”
Title
Hirotada YAMAGATA; Takatoshi TANISAKA Ikushugaku zasshi 1977. doi:10.1270/jsbbs1951.27.39
Other claims from this paper (8)
- Intervention effect Heat-shock treatment following low-temperature irradiation strikingly decreased radiation-induced injuries (survival rate, seedling height, seed fertility) in the M1 generation of rice.
- Intervention effect The radio-protection effect of the heat shock increased as shock temperature and time increased in rice.
- Intervention effect LD50 with a 60C 2-min heat shock was about 2.5 times as high as with irradiation at room temperature in rice.
- Intervention effect Higher-dose irradiation followed by heat shock markedly increased the highest obtainable mutation frequency in heading date, culm length and panicle length in rice.
- Intervention effect Frequencies of mutants per R unit in these characters with heat shock did not differ from those in usual irradiation.
- Intervention effect Genetic gain and heritability in heading date and culm length were significantly increased by heat-shock treatment in rice.
- Recommendation The authors conclude that heat-shock treatment is an effective method for enhancing the relative frequency of genic mutations versus gross chromosomal aberrations in rice.
- Mechanism The authors suggest the protective effects of heat shock may result from restricted mobility of free radicals at extremely low temperature during irradiation.