A global plastid phylogeny of the brake fern genus Pteris (Pteridaceae) and related genera in the Pteridoideae. (31st July 2014)

• Record Type: Journal Article
• Authors: Zhang, Liang; Rothfels, Carl J.; Ebihara, Atsushi; Schuettpelz, Eric; Le Péchon, Timothée; Kamau, Peris; He, Hai; Zhou, Xin‐Mao; Prado, Jefferson; Field, Ashley; Yatskievych, George; Gao, Xin‐Fen; Zhang, Li‐Bing
• Is Part Of: Cladistics. Volume 31:Number 4(2015:Aug.)
• Page Start: 406
• Page End: 423
• Publication Date: 2014-07-31
• Subjects: Cladistic analysis -- Periodicals; 578.012
• DOI: 10.1111/cla.12094
• Languages: English
• ISSNs: 0748-3007

Abstract

<abstract abstract-type="main" id="cla12094-abs-0001"> <title>Abstract</title> <p>The brake fern genus <italic>Pteris</italic> belongs to the Pteridaceae subfamily Pteridoideae. It contains 200–250 species distributed on all continents except Antarctica, with its highest species diversity in tropical and subtropical regions. The monophyly of <italic>Pteris</italic> has long been in question because of its great morphological diversity and because of the controversial relationships of the Australian endemic monospecific genus <italic>Platyzoma</italic>. The circumscription of the Pteridoideae has likewise been uncertain. Previous studies typically had sparse sampling of <italic>Pteris</italic> species and related genera and used limited DNA sequence data. In the present study, DNA sequences of six plastid loci of 146 accessions representing 119 species of <italic>Pteris</italic> (including the type of the genus) and 18 related genera were used to infer a phylogeny using maximum‐likelihood, Bayesian‐inference and maximum‐parsimony methods. Our major results include: (i) the previous uncertain relationships of <italic>Platyzoma</italic> were due to long‐branch attraction; (ii) <italic>Afropteris</italic>, <italic> Neurocallis</italic>, <italic> Ochropteris</italic> and <italic>Platyzoma</italic> are all embedded within a well‐supported <italic>Pteris sensu lato</italic>; (iii) the traditionally circumscribed <italic>Jamesonia</italic> is paraphyletic in relation to a monophyletic <italic>Eriosorus</italic>; (iv) Pteridoideae contains 15 genera: <italic>Actiniopteris</italic>, <italic> Anogramma</italic>, <italic> Austrogramme</italic>, <italic> Cerosora</italic>, <italic> Cosentinia</italic>, <italic> Eriosorus</italic>, <italic> Jamesonia</italic>, <italic> Nephopteris</italic> (no molecular data), <italic>Onychium</italic>, <italic> Pityrogramma</italic>, <italic> Pteris</italic>, <italic> Pterozonium</italic>, <italic> Syngramma</italic>, <italic> Taenitis</italic> and <italic>Tryonia</italic>; and (v) 15 well‐supported clades within <italic>Pteris</italic> are identified, which differ from one another on molecular, morphological and geographical grounds, and represent 15 major evolutionary lineages.</p> </abstract>