Molecular Phylogeny of the Fern Family Dryopteridaceae Inferred from ChloroplastrbcL andatpB Genes

Abstract

JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. The University of Chicago Press is collaborating with JSTOR to digitize, preserve and extend access to International Journal of Plant Sciences.Dryopteridaceae are a large family of leptosporangiate ferns exhibiting a rich diversity of morphological characteristics and generating many taxonomical controversies. Previous efforts to systematize this large group without a cladistic phylogenetic framework have not reached a consensus on circumscription of the family. In order to circumscribe the family and identify major groups within it, a broadscale phylogenetic analysis was conducted on these ferns plus representatives of putatively related families within the Eupolypods I clade. Two chloroplast loci, rbcL and atpB, were used in this study. A combined analysis of the two genes generated a well-resolved and strongly supported overall phylogeny of the Dryopteridaceae. The results indicate that the Dryopteridaceae form a monophyletic group with the exception of Didymochlaena, Hypodematium, and Leucostegia and are sister to a large clade comprising Lomariopsidaceae, Tectariaceae, Polypodiaceae, Davalliaceae, and Oleandraceae. Of the three previously unincorporated genera, Leptorumohra and Phanerophlebiopsis are nested within the genus Arachniodes, and Diacalpe is closely related to Acrophorus. The genus Pleocnemia, previously classified in Tectariaceae, clearly belongs in Dryopteridaceae and shows a close affinity to Lastreopsis. This study identifies four major lineages within the family, each strongly supported as a monophyletic group. Two large genera, Dryopteris and Polystichum, as traditionally defined, are shown to be polyphyletic and need to be revised in the future.

A well-sampled phylogenetic analysis of the polystichoid ferns (Dryopteridaceae) suggests a complex biogeographical history involving both boreotropical migrations and recent transoceanic dispersals

“…Dryopteridaceae (i.e., Arachniodes, Bolbitis, Cyrtomium, Dryopteris, Elaphoglossum, Mickelia, Phanerophlebia, Polystichopsis, and Polystichum) are strongly supported as monophyletic (PP BI = 1; BS ML = 94, JK MP = 89, PP BEAST = 0.99, Figs. 1a and 2, S1-S4), which is consistent with previous studies (Liu et al, 2007;Schuettpelz and Pryer, 2007). Within Dryopteridaceae, the polystichoid ferns (Cyrtomium, Phanerophlebia, and Polystichum), constitute a strongly supported clade (Figs.…”

“…A more detailed analysis of these genera will be published separately. Based on previous molecular (e.g., Little and Barrington, 2003;Li et al, 2004Li et al, , 2008Driscoll and Barrington, 2007;Schuettpelz and Pryer, 2007;Lu et al, 2007;Liu et al, 2007) and morphological studies (Smith et al, 2006;Zhang et al, 2013), four species of Elaphoglossum Schott, two of Mickelia R.C. Moran, Labiak & Sundue, one of Bolbitis Schott, eight of Dryopteris Adans., four of Arachniodes Blume, and two of Polystichopsis (J.…”

What We Do (and Don't) Know About Ferns: <I>Dryopteris</I> (Dryopteridaceae) as a Case Study

“…Elaphoglossaceae and Peranemataceae were later combined with Dryopteridaceae and the latter given nomenclatural preference (Pichi-Sermolli 1970b). Subsequent phylogenetic analyses (Li and Lu 2006a, b;Liu et al 2007) have identified four major lineages in Dryopteridaceae, which is now recognized as containing ca. 25 genera .…”

“…The relationships between Dryopteris and Nothoperanema (Tagawa) Ching, Acrophorus C. Presl, Diacalpe Blume, and Peranema D. Don have been particularly problematic; the latter three genera have together been considered a separate family (the Peranemataceae, sensu Ching 1978), and Nothoperanema a subgenus of Dryopteris (Tagawa 1938). In addition, several authors have recently found Dryopteris to be paraphyletic relative to Acrorumohra (H. Itô) H. Itô, Dryopsis Holttum & P. J. Edwards, and Revwattsia D. L. Jones (Li and Lu 2006b;Liu et al 2007;McKeown et al 2012). Several groups have recently taken steps toward a revision of the genus based on these phylogenetic analyses: To date, no exhaustive phylogenetic analysis of all 350 + species of Dryopteris has been undertaken.…”

Taxonomic revision of <I>Elaphoglossum</I> subsection <I>Muscosa</I> (<I>Dryopteridaceae</I>)

“…Morphologically most species of Elaphoglossum can be easily distinguished from other fern genera by their simple entire leaves, acrostichoid sori, transversely elongated ventral meristele in the rhizomes, dimorphic fertile and sterile leaves, and free veins. The monophyly of the genus and its placement within Dryopteridaceae have received strong support from several molecular phylogenetic studies , Liu et al 2007, Schuettpelz & Pryer 2007, Moran et al 2010). …”