Claim · model-written summary
Maize chromosomes vary in knob size and composition.
- Outcome
- size and composition of knob regionse0
Zea maysNot reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“size and composition of knob regions”
t0“maize”
Title
Complex structure of knobs and centromeric regions in maize chromosomes.
E V Ananiev; R L Phillips; H W Rines PubMed 2000
Other claims from this paper (13)
- Observation TR1 knob repeats can form fold-back DNA segments.
- Observation CentC was identified as a centromeric tandem repeat family.
- Observation Maize knob and centromeric repeat blocks are interrupted by other repeats.
- Observation Inserted sequences are mainly full-size retrotransposable elements.
- Observation Certain retrotransposable elements preferentially associate with knobs or centromeres.
- Observation Retrotransposable elements preferentially integrate at hot spots of the 180-bp repeat.
- Observation CentC, TR1 and 180-bp repeats occur on each tested maize chromosome.
- Observation Repeat copy number varies significantly from about 100 to 25,000.
- Observation Maize chromosomes vary in centromeric repeat size.
- Observation Maize knobs contain 180-bp repeats, TR1 repeats, or both.
- Observation Repeat elements also form micro clusters detectable only by in situ hybridization.
- Mechanism Maize knobs may be considered megatransposable elements.
- Mechanism Interspersed retrotransposable elements and tandem repeats may be a basic feature of eukaryotic heterochromatin organization.