Claim · model-written summary
Gene copy number does not correlate with CAF levels in Coffea canephora or C. eugenioides.
- Taxon
- Coffea canephora and C. eugenioidesCoffea eugenioides
Coffea canephorae5 - Gene
- gene copy numbere4
- Outcome
- CAF levelse4
- Direction
- no_changeinferrede4
Not reportedMaterialCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“gene copy number does not correlate with CAF levels”
e5“Comparisons between two sequenced genomes, Coffea canephora and C. eugenioides, which differ in caffeine production”
Title
Historical shifts and ecological patterns: rethinking genome size evolution in Coffea L
Sara Gonçalves Barbosa; Mariana Cansian Sattler; Maicon Nardino; et al. Journal of Evolutionary Biology 2026. doi:10.1093/jeb/voag035
Other claims from this paper (7)
- Observation Genome size in diploid Coffea showed substantial phylogenetic signal.
- Association Genome size correlated positively with caffeine content (CAF) across diploid Coffea.
- Association Genome size showed no phylogenetic association with latitudinal range, elevational distribution or thermal tolerance.
- Observation The genome size and caffeine association traces to a single lineage-specific shift at the base of the clade with the largest genomes and highest CAF, in West and Central Africa.
- Mechanism Increases in caffeine production are more likely driven by regulatory change than by gene duplication in Coffea.
- Observation The data do not support a generalized adaptive model for genome size evolution in Coffea.
- Mechanism The observed associations reflect lineage-specific historical events rather than direct adaptive responses.