All tangled up: Unraveling phylogenetics and reticulate evolution in the vining ferns, Lygodium (Schizaeales)

Premise Reticulate evolution, often accompanied by polyploidy, is prevalent in plants, and particularly in the ferns. Resolving the resulting non‐bifurcating histories remains a major challenge for plant phylogenetics. Here, we present a phylogenomic investigation into the complex evolutionary histo...

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Bibliographic Details
Published in:American journal of botany 2024-09, Vol.111 (9), p.e16389-n/a
Main Authors: Pelosi, Jessie A., Zumwalde, Bethany A., Testo, Weston L., Kim, Emily H., Burleigh, J. Gordon, Sessa, Emily B.
Format: Article
Language:English
Subjects:
aneuploidy
Autopolyploidy
Biological Evolution
Coalescence
Evolution
fern
Ferns
Ferns - classification
Ferns - genetics
Hybrids
Karyotypes
Lygodium
Origins
Phylogenetics
phylogenomics
Phylogeny
Plant layout
Plastids - genetics
Polyploidy
reticulate evolution
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Summary:Premise Reticulate evolution, often accompanied by polyploidy, is prevalent in plants, and particularly in the ferns. Resolving the resulting non‐bifurcating histories remains a major challenge for plant phylogenetics. Here, we present a phylogenomic investigation into the complex evolutionary history of the vining ferns, Lygodium (Lygodiaceae, Schizaeales). Methods Using a targeted enrichment approach with the GoFlag 408 flagellate land plant probe set, we generated large nuclear and plastid sequence datasets for nearly all taxa in the genus and constructed the most comprehensive phylogeny of the family to date using concatenated maximum likelihood and coalescence approaches. We integrated this phylogeny with cytological and spore data to explore karyotype evolution and generate hypotheses about the origins of putative polyploids and hybrids. Results Our data and analyses support the origins of several putative allopolyploids (e.g., L. cubense, L. heterodoxum) and hybrids (e.g., L. ×fayae) and also highlight the potential prevalence of autopolyploidy in this clade (e.g., L. articulatum, L. flexuosum, and L. longifolium). Conclusions Our robust phylogenetic framework provides valuable insights into dynamic reticulate evolution in this clade and demonstrates the utility of target‐capture data for resolving these complex relationships.
ISSN:0002-9122
1537-2197
1537-2197
DOI:10.1002/ajb2.16389