Claim · model-written summary
Populations in extreme predictable environments appeared to have genetically fixed germination patterns.
- Taxon
- Bromus tectorum L.
Bromus tectorume0 - Outcome
- seed germination and after-ripening patterns that are genetically fixede1
- Setting
- more extreme yet predictable environmentse1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cheatgrass (Bromus tectorum L., Poaceae)”
e1“the more extreme yet predictable environments select for seed germination and after-ripening patterns that are genetically fixed”
Title
Bromus tectorum seed germination: between-population and between-year variation
Julie Beckstead; Susan E. Meyer; Phil S. Allen Canadian Journal of Botany 1996. doi:10.1139/b96-109
Other claims from this paper (7)
- Observation Recently harvested seeds were dormant and slow to germinate.
- Observation Fully after-ripened seeds were nondormant and germinated rapidly.
- Intervention effect After-ripening shifted optimal incubation temperature from 5:15 to 20:30 °C.
- Association Between-population germination differences appeared related to risk of premature summer germination.
- Association Populations in more favorable environments tended toward greater between-year variation.
- Observation Germination percentage varied more between years than mean germination time.
- Association Maximum temperature and precipitation did not simply explain between-year differences.