Claim · model-written summary
Block-type heterochromatin was found in three species of section Paniculatae.
- Organ / stage
- pachytenee4
- Outcome
- Block-type heterochromatine4
- Value
- three speciese4
- Qualifier
- of the section Paniculataee4
NicotianaNot reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Block-type heterochromatin, defined as any longer-than-broad heterochromatic segment seen at pachytene, was found in three species of the section Paniculatae, three species of the section Tomentosae, and two species of the section Noctiflorae”
e2“A survey of the species of the genus Nicotiana was carried out”
Title
The Distribution of Heterochromatin in the Genus Nicotiana (Solanaceae)
James F. Merritt American Journal of Botany 1974. doi:10.2307/2441989
Other claims from this paper (5)
- Observation All examined Nicotiana species possess knob-type heterochromatin, defined as spherical densely staining regions of pachytene chromosomes.
- Observation Knob heterochromatin is most frequently located near the centromere, the nucleolar organizer and the chromosome ends.
- Observation Block-type heterochromatin was found in three species of section Tomentosae.
- Observation Block-type heterochromatin was found in two species of section Noctiflorae.
- Observation The three categories of block-type heterochromatin, corresponding to the three subgenera, differ in overall size, staining properties and location of the blocks.