Claim · model-written summary
Black walnuts may have diversified about 28.74 million years ago in the late Oligocene.
- Taxon
- black walnuts
Juglans nigrae0 - Outcome
- diversification of black walnutse0
- Value
- approximately 28.74 million years agoe0
- Qualifier
- might have occurrede0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the diversification of black walnuts might have occurred approximately 28.74 million years ago during the late Oligocene”
Title
Hang Ye; Hengzhao Liu; Huijuan Zhou; et al. The Plant Genome 2025. doi:10.1002/tpg2.70172
Other claims from this paper (9)
- Method / resource The study constructed a high-density map of genomic variation across 108 Rhysocaryon accessions.
- Observation The 108 Rhysocaryon accessions were delimited into four groups despite introgression.
- Observation The clade containing Juglans hindsii and Juglans californica diverged earliest.
- Observation Juglans microcarpa may be a hybrid descendant of Juglans nigra and J. hindsii.
- Association Ancestral black walnut populations kept diverging as climate oscillated, preceding South American colonization.
- Association Black walnut population size fluctuated with Quaternary glacial and interglacial periods.
- Association J. nigra contained highly divergent genomic regions associated with development, reproduction, disease resistance and stress tolerance.
- Observation WRKY41 was identified as a potential driver of J. nigra adaptation.
- Observation ERF012 was identified as a potential driver of J. nigra adaptation.