Phylogenomics of the pantropical Connaraceae: revised infrafamilial classification and the evolution of heterostyly.
Name
s00606-024-01909-y.pdf
Description
visibility:open
Size
2.68 MB
Format
Adobe PDF
Checksum (CRC64NVME)
T4jbLV+jQ+M=
Resource type
Journal article
Date published
August 3, 2024
Abstract
Connaraceae is a pantropical family of about 200 species containing lianas and small trees with remarkably diverse floral polymorphisms, including distyly, tristyly, homostyly, and dioecy. To date, relationships within the family have not been investigated using a targeted molecular phylogenetic treatment, severely limiting systematic understanding and reconstruction of trait evolution. Accordingly, their last infrafamilial classification was based only on morphological data. Here, we used phylogenomic data obtained using the Angiosperms353 nuclear target sequence capture probes, sampling all tribes and almost all genera, entirely from herbarium specimens, to revise infrafamilial classification and investigate the evolution of heterostyly. The backbone of the resulting molecular phylogenetic tree is almost entirely resolved. Connaraceae consists of two clades, one containing only the African genus (4 or 5 species), which we newly recognize at the subfamily level. Vegetative and reproductive synapomorphies are proposed for Manotoideae. Within Connaroideae, Connareae is expanded to include the former Jollydoreae. The backbone of Cnestideae, which contains more than half of the Connaraceae species, remains incompletely resolved. Reconstructions of reproductive system evolution are presented that tentatively support tristyly as the ancestral state for the family, with multiple parallel losses, in agreement with previous hypotheses, plus possible re-gains. However, the great diversity of stylar polymorphisms and their phylogenetic lability preclude a definitive answer. Overall, this study reinforces the usefulness of herbarium phylogenomics, and unlocks the reproductive diversity of Connaraceae as a model system for the evolution of complex biological phenomena.
Project(s)
Priority 4: Accelerated Taxonomy
Plant and Fungal Trees of Life (PAFTOL) project
Funder
| Funder name | Awards |
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Switzerland | Grant 310030_185251 |
Calleva Foundation, United Kingdom | |
Universität Basel, Switzerland | Open access funding |
Journal title
Plant Systematics and Evolution
Volume
310
Article number
29
Publisher
Springer Science and Business Media LLC
Place of publication
Berlin/Heidelberg, Germany
ISSN
0378-2697
eISSN
1615-6110
Date accepted
May 28, 2024
Official URL
Rights statement
In Copyright
Additional information
IF = 1.644 (2023-2024)