Claim · model-written summary
One colony had 69% heterozygotes among 42 sampled plants.
- Taxon
- Clarkia dudleyana
Clarkia dudleyanat0 - Outcome
- heterozygouse0
- Value
- 69%e0
- Qualifier
- 42 plants samplede0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in one colony 69% of 42 plants sampled were heterozygous”
t0“Clarkia dudleyana”
Title
Chromosomal Differentiation in Clarkia dudleyana
Richard Snow American Journal of Botany 1960. doi:10.2307/2439611
Other claims from this paper (14)
- Observation Seventeen point one percent of sampled individuals were heterozygous for reciprocal translocations.
- Observation About 2% of examined plants had supernumerary chromosomes.
- Observation Translocation heterozygotes were concentrated near the geographical center of the species range.
- Observation Most populations had none or few translocation heterozygotes.
- Observation At least five chromosome arrangements were observed at that locality.
- Observation Hybrids between colonies were invariably translocation heterozygotes.
- Observation The largest hybrid chromosome association was a chain of all 18 chromosomes.
- Association Geographical separation was not correlated with cytological differentiation.
- Observation Heterozygotes with rings of 4 or 6 chromosomes were highly fertile.
- Mechanism Regular alternate disjunction of ring chromosomes explains high fertility of small-ring heterozygotes.
- Observation Rings of 12 to 18 chromosomes from interpopulation crosses had more irregular segregation and high sterility.
- Observation The authors suggest that heterozygotes may have selective advantage in some localities.
- Mechanism The authors postulate habitat-specific selection for chromosome arrangement homozygosity.
- Mechanism The authors suggest Oenothera complex heterozygotes arose through hybridization of differentiated races.