Genetic analysis of a genus of plant mimics (Alseuosmia A.Cunn; Alseuosmiaceae) reveals incongruence between morphology and phylogeny and possible mimetic polymorphism
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Other Title
Authors
Shepherd, L.D.
Townsend, A.
de Lange, Peter
Perrie, L.R.
Townsend, A.
de Lange, Peter
Perrie, L.R.
Author ORCID Profiles (clickable)
Degree
Grantor
Date
2023-11-17
Supervisors
Type
Journal Article
Ngā Upoko Tukutuku (Māori subject headings)
Keyword
New Zealand
hybridisation
mimetic polymorphism
hybridisation
mimetic polymorphism
ANZSRC Field of Research Code (2020)
Citation
Shepherd, L.D., Townsend, A., de Lange, P.J., & Perrie, L.R. (2023). Genetic analysis of a genus of plant mimics (Alseuosmia A.Cunn; Alseuosmiaceae) reveals incongruence between morphology and phylogeny and possible mimetic polymorphism. Evolutionary Journal of the Linnean Society, 2, 1-18. https://doi.org/10.1093/evolinnean/kzad005
Abstract
Alseuosmia (Alseuosmiaceae) is an endemic New Zealand genus of small trees and shrubs, which is unusual in that some taxa appear to morphologically mimic unrelated species. The taxonomy of the group has long been debated, with the extreme morphological diversity in A. banksii causing much of the confusion. Here we use ddRADseq to examine the genetic relationships between species of the genus, with a particular focus on the morphological forms of A. banksii. Our analyses revealed that for species in the northern part of the distribution, genetic relationships largely matched geography rather than species boundaries based on morphology, and that hybridization between morphs appears to be common. A diversity of morphologies is present within these northern Alseuosmia, including multiple forms that appear to mimic unrelated genera, and these may constitute a single gene pool. Further south, two species (A. turneri and A. pusilla) were genetically distinct in sympatry. We suggest maintaining the current taxonomy until further research can be undertaken.
Publisher
Linnean Society of London
Permanent link
Link to ePress publication
DOI
https://doi.org/10.1093/evolinnean/kzad005
Copyright holder
© 2023 The Linnean Society of London.
Copyright notice
CC BY Attribution 4.0 International