Claim · model-written summary
Frequencies of mutants per R unit in these characters with heat shock did not differ from those in usual irradiation.
- Taxon
- Rice
Oryza sativat0 - Treatment
- the heat-shock treatmente4
- Outcome
- frequencies of mutants per R unite5
- Direction
- did not differe5
- Comparator
- usual irradiatione5
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier
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”
e5“the frequencies of mutants per R unit in all these characters did not differ from those in usual irradiation”
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 The frequency of mutants in seed fertility was clearly decreased by heat shock after irradiation in rice.
- 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.