Claim · model-written summary
Supernumerary chromosome counts vary from zero to four.
SolidagoNot reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The supernumerary chromosomes are numerically variable. Their number ranges between 0 to 4”
t0“Solidago”
Title
Supernumerary Chromosomes of some Species ofSolidagoand a Related Taxon
Brij M. Kapoor Caryologia 1978. doi:10.1080/00087114.1978.10796755
Other claims from this paper (11)
- Observation Counts are not constant within plants or species.
- Observation Supernumerary chromosomes were absent in dividing pollen mother cells.
- Observation Supernumeraries were euchromatic in ten taxa.
- Observation Supernumeraries tended to be heterochromatic in three Solidago species.
- Observation Supernumeraries were short or resembled satellite chromatin knobs.
- Observation Supernumeraries had variable shape and appeared acentric or terminally centromeric.
- Observation Meiotic chromosomes generally formed regular bivalents and disjoined normally.
- Observation Pollen fertility was high except in one S. juncea population.
- Association Authors infer no apparent adverse reproductive effect of supernumeraries.
- Mechanism Authors suggest supernumeraries may arise by constriction disarticulation, misdivision or translocations.
- Intervention effect Pretreatment was discounted as the source because chromosomes occurred in treated and untreated material.