Claim · model-written summary
All chromosome types appeared involved in micronucleus formation.
Zea maysNot reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All chromosome types seem to be involved in micronucleus formation”
e1“in maize tapetum”
Title
Chromosome Nondisjunction and Instabilities in Tapetal Cells Are Affected by B Chromosomes in Maize
A Mauricio Chiavarino; Marcela Rosato; Silvia Manzanero; et al. Genetics 2000. doi:10.1093/genetics/155.2.889
Other claims from this paper (11)
- Observation Abnormal mitosis in maize tapetum produced binucleate cells that later disintegrated.
- Association B chromosomes formed more micronuclei than knobbed chromosomes.
- Association Knobbed chromosomes formed more micronuclei than chromosomes without knobs.
- Association Micronuclei were more frequent in 1B plants.
- Association Micronuclei were more frequent in a genotype selected for low B transmission.
- Observation Nondisjunction occurred in all FISH-labeled chromosome types.
- Observation Unlabeled bridges and delayed chromatids occurred before binucleate-cell formation.
- Mechanism The authors inferred nondisjunction may affect all chromosomes in the maize complement.
- Observation The study newly reports nondisjunction of normal A chromosomes in tapetal cells.
- Observation The authors conclude nondisjunction and micronucleus formation regularly accompany tapetal cell death.
- Association B chromosomes strongly increased A chromosome instability.