Tangled webs and spider-flowers: Phylogenomics, biogeography, and seed morphology inform the evolutionary history of Cleomaceae.
Angiosperms353
Brassicales
Cleomaceae
continental disjunctions
historical biogeography
model clade
phylogenomics
seed morphology
target capture
Journal
American journal of botany
ISSN: 1537-2197
Titre abrégé: Am J Bot
Pays: United States
ID NLM: 0370467
Informations de publication
Date de publication:
29 Aug 2024
29 Aug 2024
Historique:
revised:
07
06
2024
received:
29
02
2024
accepted:
09
06
2024
medline:
31
8
2024
pubmed:
31
8
2024
entrez:
29
8
2024
Statut:
aheadofprint
Résumé
Cleomaceae is an important model clade for studies of evolutionary processes including genome evolution, floral form diversification, and photosynthetic pathway evolution. Diversification and divergence patterns in Cleomaceae remain tangled as research has been restricted by its worldwide distribution, limited genetic sampling and species coverage, and a lack of definitive fossil calibration points. We used target sequence capture and the Angiosperms353 probe set to perform a phylogenetic study of Cleomaceae. We estimated divergence times and biogeographic analyses to explore the origin and diversification of the family. Seed morphology across extant taxa was documented with multifocal image-stacking techniques and morphological characters were extracted, analyzed, and compared to fossil records. We recovered a well-supported and resolved phylogenetic tree of Cleomaceae generic relationships that includes 236 (~86%) species. We identified 11 principal clades and confidently placed Cleomella as sister to the rest of the family. Our analyses suggested that Cleomaceae and Brassicaceae diverged ~56 mya, and Cleomaceae began to diversify ~53 mya in the Palearctic and Africa. Multiple transatlantic disjunct distributions were identified. Seeds were imaged from 218 (~80%) species in the family and compared to all known fossil species. Our results represent the most comprehensive phylogenetic study of Cleomaceae to date. We identified transatlantic disjunctions and proposed explanations for these patterns, most likely either long-distance dispersals or contractions in latitudinal distributions caused by climate change over geological timescales. We found that seed morphology varied considerably but mostly mirrored generic relationships.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e16399Informations de copyright
© 2024 The Author(s). American Journal of Botany published by Wiley Periodicals LLC on behalf of Botanical Society of America.
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