Abstract
The results showed that space flight led to the decline in germination percentage, seedling survival rate and seed setting rate of Japonica rice when compared with the check, and had facilitating or inhibiting effects on seedling growth. Physiological damage after space flight was much smaller than that treated with γ ray irradiation. Some cultivars showed the segregations of grain color in the M 1 generation. More stronger segregation of characters such as plant height and heading date appeared in the M 2 generation. Mutation frequency(MF) and mutagenic efficiency(ME)varied with different genotype. After treatment with the same cultivar by space flight and γ ray, MF and ME varied with different mutation characters. However, many mutants with desirable agronomic characters were obtained in M 2 generation and were probably to be bred as a new cultivar by selection.
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Claims 10
Claim · model-written summary
Space flight reduced germination percentage versus the check.
- Taxon
- Japonica rice
_by_Augustus_Binu.jpg?width=60)
Oryza sativa Japonica Groupe0 - Treatment
- space flighte0
- Outcome
- germination percentagee0
- Direction
- declinee0
- Comparator
- the checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_by_Augustus_Binu.jpg?width=500)
Verbatim
e0“space flight led to the decline in germination percentage, seedling survival rate and seed setting rate of Japonica rice when compared with the check”
t0“JAPONICA RICE”
Claim · model-written summary
Space flight reduced seedling survival rate versus the check.
- Taxon
- Japonica riceOryza sativa Japonica Groupe0
- Treatment
- space flighte0
- Outcome
- seedling survival ratee0
- Direction
- declinee0
- Comparator
- the checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“space flight led to the decline in germination percentage, seedling survival rate and seed setting rate of Japonica rice when compared with the check”
t0“JAPONICA RICE”
Claim · model-written summary
Space flight reduced seed setting rate versus the check.
- Taxon
- Japonica riceOryza sativa Japonica Groupe0
- Treatment
- space flighte0
- Outcome
- seed setting ratee0
- Direction
- declinee0
- Comparator
- the checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“space flight led to the decline in germination percentage, seedling survival rate and seed setting rate of Japonica rice when compared with the check”
t0“JAPONICA RICE”
Claim · model-written summary
Space flight facilitated or inhibited seedling growth.
- Taxon
- Japonica riceOryza sativa Japonica Groupe0
- Treatment
- space flighte0
- Outcome
- seedling growthe0
- Direction
- facilitating or inhibitinge0
- Comparator
- the checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“space flight led to the decline in germination percentage, seedling survival rate and seed setting rate of Japonica rice when compared with the check, and had facilitating or inhibiting effects on seedling growth”
t0“JAPONICA RICE”
Claim · model-written summary
Space flight caused less physiological damage than gamma irradiation.
- Taxon
- JAPONICA RICEOryza sativa Japonica Groupt0
- Treatment
- space flighte0
- Outcome
- Physiological damagee0
- Direction
- much smallere0
- Comparator
- γ ray irradiatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Physiological damage after space flight was much smaller than that treated with γ ray irradiation”
t0“JAPONICA RICE”
Claim · model-written summary
Some cultivars segregated for grain color in M 1.
- Taxon
- JAPONICA RICEOryza sativa Japonica Groupt0
- Material
- Some cultivarse0
- Organ / stage
- M 1 generatione0
- Outcome
- segregations of grain colore0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Some cultivars showed the segregations of grain color in the M 1 generation”
t0“JAPONICA RICE”
Claim · model-written summary
Plant height and heading date segregated more strongly in M 2.
- Taxon
- JAPONICA RICEOryza sativa Japonica Groupt0
- Organ / stage
- M 2 generatione0
- Outcome
- segregation of characters such as plant height and heading datee0
- Direction
- More strongere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“More stronger segregation of characters such as plant height and heading date appeared in the M 2 generation”
t0“JAPONICA RICE”
Claim · model-written summary
Mutation frequency and mutagenic efficiency varied with genotype.
- Taxon
- JAPONICA RICEOryza sativa Japonica Groupt0
- Material
- different genotypee0
- Outcome
- Mutation frequency(MF) and mutagenic efficiency(ME)e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mutation frequency(MF) and mutagenic efficiency(ME)varied with different genotype”
t0“JAPONICA RICE”
Claim · model-written summary
Mutation frequency and efficiency varied by mutation character after either treatment.
- Taxon
- JAPONICA RICEOryza sativa Japonica Groupt0
- Material
- the same cultivare0
- Treatment
- space flight and γ raye0
- Outcome
- MF and MEe0
- Qualifier
- different mutation characterse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After treatment with the same cultivar by space flight and γ ray, MF and ME varied with different mutation characters”
t0“JAPONICA RICE”
Claim · model-written summary
Many mutants with desirable agronomic traits were obtained in M 2.
- Taxon
- JAPONICA RICEOryza sativa Japonica Groupt0
- Material
- mutantse0
- Organ / stage
- M 2 generatione0
- Outcome
- desirable agronomic characterse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“many mutants with desirable agronomic characters were obtained in M 2 generation”
t0“JAPONICA RICE”