Claim · model-written summary
Translocation heterozygotes clustered near the center of the species range.
- Taxon
- Clarkia dudleyana
Clarkia dudleyanat0 - Outcome
- translocation heterozygotese0
- Direction
- concentratede0
- Setting
- geographical center of distributione0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“The translocation heterozygotes are not distributed regularly over the species range but are concentrated near the geographical center of distribution.”
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 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.
- 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.