Claim · model-written summary
The largest hybrid chromosome association was a chain of all 18 chromosomes.
- Taxon
- Clarkia dudleyana
Clarkia dudleyanat0 - Outcome
- chain of all 18 chromosomese0
- Value
- 18 chromosomese0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the largest association found in such hybrids being a chain of all 18 chromosomes (a potential ring of 18).”
t0“CLARKIA DUDLEYANA”
Title
CHROMOSOMAL DIFFERENTIATION IN CLARKIA DUDLEYANA
Richard Snow American Journal of Botany 1960. doi:10.1002/j.1537-2197.1960.tb07129.x
Other claims from this paper (13)
- Observation Clarkia dudleyana had n=9 chromosomes.
- Observation Seventeen point one percent of 275 individuals were reciprocal-translocation heterozygotes.
- Observation Supernumerary chromosomes occurred in about 2% of examined plants.
- Observation Translocation heterozygotes clustered near the center of the species range.
- Observation One colony had 69% heterozygotes among 42 plants.
- Observation At least five chromosome arrangements were present in that locality.
- Observation Hybrids between colonies were invariably translocation heterozygotes.
- Association Geographic separation showed no correlation with cytological differentiation.
- Observation Heterozygotes with rings of four or six chromosomes were highly fertile.
- Observation Larger 12–18 chromosome rings had irregular segregation and high sterility.
- Observation The authors suggest heterozygotes may enjoy a selective advantage in some localities.
- Observation The authors postulate local selection for a chromosome arrangement through a position effect.
- Observation Population chromosomal differentiation suggests complex Oenothera heterozygotes arose through hybridization of differentiated races.