Claim · model-written summary
Geographic separation showed no correlation with cytological differentiation.
- Taxon
- Clarkia dudleyana
Clarkia dudleyanat0 - Outcome
- degree of cytological differentiatione0
- Setting
- geographical separatione0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No correlation is evident between geographical separation and degree of cytological differentiation.”
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.
- Observation The largest hybrid chromosome association was a chain of all 18 chromosomes.
- 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.