Phylogeny and relationships of the neotropical Adiantum raddianum group (Pteridaceae)
Abstract
© International Association for Plant Taxonomy (IAPT) 2016. With more than 200 species,
the maidenhair fern genus Adiantum is among the top ten most diverse fern genera.
Adiantum is pantropical in distribution and, due to the presence of a unique synapomorphy
(sporangia borne on indusia rather than laminae), perhaps the most easily recognized
fern genus. Many of its members, including numerous cultivars derived from A. raddianum,
are grown as ornamentals. Because of its size, a comprehensive taxonomic study of
Adiantum is difficult and the genus is perhaps better approached through a series
of narrower studies. Here, we focus specifically on A. raddianum and putative allies.
We find a newly defined A. raddianum group to be strongly supported as monophyletic
and segregated from other maidenhair ferns on the basis of genetic as well as morphological
characteristics. Bayesian inference and maximum likelihood analyses of plastid atpA,
chlL, chlN, rbcL, and rpoA sequences support the A raddianum clade as sister to A
poiretii and its allies. We identify round-reniform indusia to be a characteristic
of the A.raddianum group (vs. lunate in the A.poiretii group). Additionally, we find
species in the Apoiretii group to differ in having a unique 66 nucleotide deletion
in our chlN gene alignment. The neotropical Araddianum group comprises at least 17
species (14 studied here), some widely distributed; one was recently described (A.
alan-smithii).
Type
Journal articleSubject
Science & TechnologyLife Sciences & Biomedicine
Plant Sciences
Evolutionary Biology
chlN
cpDNA
ferns
maidenhair
RBCL NUCLEOTIDE-SEQUENCES
VITTARIOID FERNS
EXTANT FERNS
CLASSIFICATION
AFFINITIES
EVOLUTION
INFERENCE
TAXONOMY
MRBAYES
GENES
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https://hdl.handle.net/10161/21749Published Version (Please cite this version)
10.12705/656.1Publication Info
Hirai, RY; Schuettpelz, E; Huiet, L; Pryer, KM; Smith, AR; & Prado, J (2016). Phylogeny and relationships of the neotropical Adiantum raddianum group (Pteridaceae).
Taxon, 65(6). pp. 1225-1235. 10.12705/656.1. Retrieved from https://hdl.handle.net/10161/21749.This is constructed from limited available data and may be imprecise. To cite this
article, please review & use the official citation provided by the journal.
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Kathleen M. Pryer
Professor of Biology

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