Australian biogeography, climate-dependent diversification and phylogenomics of the spectacular Chamelaucieae tribe (Myrtaceae) DOI Creative Commons
Francis J. Nge, Ed Biffin, Barbara Lynette Rye

et al.

Australian Systematic Botany, Journal Year: 2025, Volume and Issue: 38(1)

Published: Feb. 21, 2025

Chamelaucieae is a diverse tribe in Myrtaceae with ~800 species 37 genera distributed across Australia. We applied target capture sequencing using the Angiosperms353 probe set for 131 taxa as part of Genomics Australian Plants initiative. Sampling all (36) from 10 11 named subtribes, we present phylogenomic analysis tribe. This approach has allowed us to better resolve subtribal relationships tribe, resulting an updated classification and additional subtribe (total 12 subtribes including Triplarininae). Despite these advances, phylogenetic placements Stenostegiinae, Astarteinae, Micromyrtinae remain equivocal resolution should be focus future research. constructed dated phylogeny this genomic dataset investigate tribe’s biogeographic history diversification dynamics. estimate that crown radiation occurred Eocene (c. 42 Ma), ancestral area origin Australia unresolved. Subsequent divergence mostly south-west Western frequent dispersals there into semi-arid arid interior since Miocene (20 Ma). Dispersals out northern eastern were limited confined dispersal events interior. Using paleoenvironmental models show after initial radiation, declined rapidly until Eocene–Oligocene boundary extinction pulse event subsequently more slowly present, modest increase during Middle Climatic Optimum. No significant rate shifts detected within clades except Chamelauciinae. There was no geographic-dependent Our results add growing literature revealing high plant diversity due time accumulation attributed long-term climatic stability rather than elevated rates.

Language: Английский

Australian biogeography, climate-dependent diversification and phylogenomics of the spectacular Chamelaucieae tribe (Myrtaceae) DOI Creative Commons
Francis J. Nge, Ed Biffin, Barbara Lynette Rye

et al.

Australian Systematic Botany, Journal Year: 2025, Volume and Issue: 38(1)

Published: Feb. 21, 2025

Chamelaucieae is a diverse tribe in Myrtaceae with ~800 species 37 genera distributed across Australia. We applied target capture sequencing using the Angiosperms353 probe set for 131 taxa as part of Genomics Australian Plants initiative. Sampling all (36) from 10 11 named subtribes, we present phylogenomic analysis tribe. This approach has allowed us to better resolve subtribal relationships tribe, resulting an updated classification and additional subtribe (total 12 subtribes including Triplarininae). Despite these advances, phylogenetic placements Stenostegiinae, Astarteinae, Micromyrtinae remain equivocal resolution should be focus future research. constructed dated phylogeny this genomic dataset investigate tribe’s biogeographic history diversification dynamics. estimate that crown radiation occurred Eocene (c. 42 Ma), ancestral area origin Australia unresolved. Subsequent divergence mostly south-west Western frequent dispersals there into semi-arid arid interior since Miocene (20 Ma). Dispersals out northern eastern were limited confined dispersal events interior. Using paleoenvironmental models show after initial radiation, declined rapidly until Eocene–Oligocene boundary extinction pulse event subsequently more slowly present, modest increase during Middle Climatic Optimum. No significant rate shifts detected within clades except Chamelauciinae. There was no geographic-dependent Our results add growing literature revealing high plant diversity due time accumulation attributed long-term climatic stability rather than elevated rates.

Language: Английский

Citations

0