Claim · model-written summary
The authors associated abnormal quartettes and lower tetraploid pollen viability with meiotic irregularities.
- Taxon
- Watermelons
Citrullus lanatust0 - Outcome
- lower pollen viabilitye0
- Qualifier
- irregularities observed at meiosise0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The abnormal quartette formations and lower pollen viability of tetraploids were believed associated with irregularities observed at meiosis.”
t0“Watermelons”
Title
Observations on Sterility of Induced Autotetraploid Watermelons1
R. L. Lower; K. W. Johnson Journal of the American Society for Horticultural Science 1969. doi:10.21273/jashs.94.4.367
Other claims from this paper (13)
- Intervention effect Colchicine seed soaking was more effective than growing-point treatment at producing autotetraploid watermelons.
- Observation Diploid pollen appeared more viable than tetraploid pollen.
- Observation Over two-thirds of tetraploid pollen germinated normally.
- Observation A small percentage of tetraploid pollen produced multiple normal-sized or one bifurcated pollen tube.
- Observation Germinating diploid pollen produced only one unbranched pollen tube.
- Intervention effect Tetraploid plants failed to set fruit after pollination with tetraploid pollen.
- Intervention effect Tetraploid plants set fruit after pollination with diploid pollen.
- Observation Diploid meiosis was regular.
- Observation Tetraploid meiosis showed irregularities.
- Observation Some tetraploid pollen mother cells contained microsporocytes in addition to four microspores at the quartette stage.
- Observation Tetraploid and diploid megaspores showed no apparent differences in preliminary observations.
- Observation Tetraploids still produced sufficient apparently viable pollen despite meiotic irregularities.
- Mechanism A physiological cause of autotetraploid watermelon self-sterility was suggested.