Claim · model-written summary
Within each cultivar, normal pollen rate was higher than fertility and the two were correlated.
- Taxon
- rice
Oryza sativat0 - Outcome
- 正常花粉率e0
- Direction
- 高くe0
- Comparator
- 稔実率e0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“TETRAPLOID RICE”
e0“各品種共に正常花粉率は稔実率より高く, 又両者の間には相関が認められた”
Title
H. OKA The Japanese Journal of Genetics 1954. doi:10.1266/jjg.29.53
Other claims from this paper (19)
- Observation Mean trait values of tetraploid rice lines are characteristic of each cultivar, and cultivar-to-cultivar variation is as clear in tetraploids as in diploids.
- Observation Seed fertility of tetraploid rice cultivars ranged from about 1% to 55% (3-year, 6-season mean).
- Association Tetraploids of continental-group cultivars tended to have higher fertility.
- Observation Normal pollen rate varied among cultivars from about 55% to 95%.
- Observation The 4x/2x ratio of stomatal cell length varied among cultivars from about 1.15 to 1.50.
- Association In diploids, smaller stomata went with a larger 4x/2x ratio; the same tendency was found for grain (籾) size.
- Intervention effect Chromosome doubling generally decreased culm length, grains per panicle and panicle number.
- Intervention effect Chromosome doubling generally increased panicle length and culm length.
- Association Among cultivars, the 4x/2x ratios of culm length, panicle length and grains per panicle were correlated with one another.
- Association The 4x/2x ratios of culm length, panicle length and grains per panicle were not correlated with the stomatal 4x/2x ratio or with fertility.
- Intervention effect Chromosome doubling did not change photoperiod sensitivity.
- Intervention effect Heading date of tetraploids was generally similar to that of their diploids, but the difference ranged from about 4 days earlier to 12 days later by cultivar.
- Observation Heading in tetraploids was generally incomplete, and the distance between panicle neck and flag-leaf node varied among cultivars.
- Intervention effect Tetraploid seed had a lower germination rate than diploid seed.
- Intervention effect Tetraploid seed germinated more slowly than diploid seed.
- Observation Seed germination rate varied among cultivars from about 45% to 95%, and faster-germinating cultivars had higher germination rates.
- Association In tetraploids, continental-group cultivars germinated faster than island-type cultivars and had a higher germination rate.
- Intervention effect Chlorate resistance was unchanged by chromosome doubling, and low-temperature resistance was unchanged or slightly stronger.
- Intervention effect Drought tolerance measured by the Mimosa method was weakened in tetraploids.