Polyploidy linked with species richness but not diversification rates or niche breadth in Australian Pomaderreae (Rhamnaceae) DOI Creative Commons
Francis J. Nge, Timothy Hammer, Thaís Vasconcelos

et al.

Annals of Botany, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 23, 2024

Abstract Background and Aims Polyploidy is an important evolutionary driver for plants has been linked with higher species richness increases in diversification rate. These correlations between ploidy plant radiations could be the result of polyploid lineages exploiting broader niche space novel niches due to their enhanced adaptability. The evolution its link across Australian continent not well understood. Here, we focus on Australasian Rhamnaceae tribe Pomaderreae. Methods We generated a densely sampled phylogeny (90 %, 215/240 species) used it test ploidy. obtained 30 orthologous nuclear loci per sample dated using treePL. Ploidy estimates each sequenced were nQuire, based phased sequence data. MiSSE obtain tip rates tested significant relationships also assessed level breadth, distributional records, modelling WorldClim Key Results extensive tribe, almost half (45 %) majority genera exhibiting this trait. found positive relationship polyploidy genus size (i.e. richness), but non-significant rates. did significantly wider occupancy Pomaderreae; however, allow transitions into wetter niches. Spatially, eastern Australia hotspot Pomaderreae contrast south-west Western Australia. Conclusions complex. Ancient polyploidization events likely played role species-rich genera. A lag time effect may explain uncoupling extant lineages. Further studies other groups are required validate these hypotheses.

Language: Английский

Complete genus‐level phylogenomics and new subtribal classification of the pantropical plant family Annonaceae DOI Creative Commons
Francis J. Nge, Tanawat Chaowasku, Anissara Damthongdee

et al.

Taxon, Journal Year: 2024, Volume and Issue: 73(6), P. 1341 - 1369

Published: Oct. 9, 2024

Abstract Annonaceae is a major tropical plant family particularly diverse in rain forests of the world. Although classification and systematics has significantly improved over past decade, most recent was based on reduced set plastid markers incomplete genus‐level taxon sampling. This recognised 4 subfamilies 20 tribes. Yet, several important problems persisted, especially phylogenetic placement African genus Meiocarpidium , resolution intertribal relationships within subfamily Malmeoideae, tribe Miliuseae with 23 genera, contrasting liana Artabotrys when using nuclear versus data. Here, previously published Annonaceae‐specific bait kit, we generated for first time complete (108 taxa) phylogenomic tree 373 loci. We show that sister to Ambavioideae should be considered as not separate subfamily. recovered belonging Duguetieae, Xylopieae inferred data, two other Letestudoxa Pseudartabotrys . Finally, were able resolve Malmeoideae Miliuseae. Nevertheless, strong gene conflict mainly at backbone tribe, probably linked rapid diversification its origin, leading substantial lineage sorting. suggest this will hard resolve. Using novel framework recognize 25 subtribes, 21 new, improve infrafamilial Annonaceae.

Language: Английский

Citations

4
Target capture sequencing clarifies key relationships in the Eriostemon group (Rutaceae: Zanthoxyloideae) and supports a reclassification of Philotheca, including the recognition of two new genera DOI Creative Commons
Harvey K. Orel, Todd G. B. McLay,

Paul I. Forster

et al.

Taxon, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 6, 2025

Abstract The Eriostemon group (Rutaceae) is a clade of 16 genera and ~ 209 species endemic to Australia, New Zealand Caledonia. Recent efforts address taxonomic phylogenetic uncertainty in the using plastome nuclear ribosomal DNA sequences have made some progress but also highlighted problematic areas that require further research. In particular, current circumscription Philotheca known be non‐monophyletic, unclear relationships prevented reclassification group. We generated target capture data Angiosperms353 universal bait kit conducted analyses on with aims resolving uncertain backbone clarifying . Our results uncovered extensive cytonuclear discordance group, conflict between our phylogenies previous observed several key tree. Despite this, positions polyphyletic lineages were consistent enough across enable confident genus, which presented herein. Two sections , P. sect. Corynonema Erionema are raised generic rank under names Erioseira respectively. Cyanochlamys transferred into genus Muiriantha type section retained becomes entirety genus. Appropriate nomenclatural changes transfer all currently recognised subspecies their respective this new classification.

Language: Английский

Citations

0
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
Polyploidy linked with species richness but not diversification rates or niche breadth in Australian Pomaderreae (Rhamnaceae) DOI Creative Commons
Francis J. Nge, Timothy Hammer, Thaís Vasconcelos

et al.

Annals of Botany, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 23, 2024

Abstract Background and Aims Polyploidy is an important evolutionary driver for plants has been linked with higher species richness increases in diversification rate. These correlations between ploidy plant radiations could be the result of polyploid lineages exploiting broader niche space novel niches due to their enhanced adaptability. The evolution its link across Australian continent not well understood. Here, we focus on Australasian Rhamnaceae tribe Pomaderreae. Methods We generated a densely sampled phylogeny (90 %, 215/240 species) used it test ploidy. obtained 30 orthologous nuclear loci per sample dated using treePL. Ploidy estimates each sequenced were nQuire, based phased sequence data. MiSSE obtain tip rates tested significant relationships also assessed level breadth, distributional records, modelling WorldClim Key Results extensive tribe, almost half (45 %) majority genera exhibiting this trait. found positive relationship polyploidy genus size (i.e. richness), but non-significant rates. did significantly wider occupancy Pomaderreae; however, allow transitions into wetter niches. Spatially, eastern Australia hotspot Pomaderreae contrast south-west Western Australia. Conclusions complex. Ancient polyploidization events likely played role species-rich genera. A lag time effect may explain uncoupling extant lineages. Further studies other groups are required validate these hypotheses.

Language: Английский

Citations

1