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Molecular phylogeny of the polystichoid ferns in Asia based on rbcL sequences
Lu, Jin-Mei; Barrington, David S.; Li, De-Zhu
AbstractPolystichum has often been treated as a sub-cosmopolitan genus of 180-230 species (i.e., Polystichum s.l.), but several segregate genera, such as Cyrtogonellum, Cyrtomidictyum, Cyrtomium, Phanerophlebia, and Sorolepidium, have been recognized in various treatments. Together, these genera constitute the polystichoid ferns. We used a data set of 47 species of the polystichoid ferns and three outgroups, including new rbcL sequences for six species in Asia, to address their phylogeny. Maximum-parsimony (MP) and Bayesian inference analyses were performed. The polystichoid ferns were resolved to include four major clades, the tropical American Phanerophlebia clade, the Cyrtomium s.s. clade, the Polystichum s.s. clade, and an eastern Asian clade containing Cyrtomium subser. Balansana, Cyrtogonellum, three sections of Polystichum, and Cyrtomidictyum (the BCPC clade). The Cyrtomium s.s. clade included 15 species of the genus but excluded subser. Balansana. The Polystichum s.s. clade was resolved as being monophyletic with relatively low bootstrap support, as long as Sorolepidium is included in Polystichum. The overall topology retrieved by the Bayesian analysis was similar to that of the MP tree, but generally had higher internal support. Based on the molecular phylogeny, three sections of Polystichum s.l., i.e., sect. Sphaenopolystichum, sect. Haplopolystichum, and sect. Crucifilix, may be more closely related to other members of the BCPC group. The eastern Asian BCPC group shared once-pinnate fronds, except for Polystichum sect. Sphaenopolystichum. Morphologically, once-pinnate leaf dissection and reticulate venation appear to be ancestral in the polystichoid ferns.
KeywordBcpc Group Cyrtomium S.s. Molecular Phylogeny Polystichoid Ferns Polystichtum S.s. Rbcl.
Subject AreaPlant Sciences ; Evolutionary Biology
Indexed BySCI
WOS Research AreaPlant Sciences ; Evolutionary Biology
WOS SubjectPlant Sciences ; Evolutionary Biology
WOS IDWOS:000244622500005
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Document Type期刊论文
Affiliation1.Chinese Acad Sci, Kunming Inst Bot, Lab Biodivers & Biogeog, Kunming 650204, Yunnan, Peoples R China
2.Univ Vermont, Dept Bot, Pringle Herbarium, Burlington, VT 05405 USA
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GB/T 7714
Lu, Jin-Mei,Barrington, David S.,Li, De-Zhu. Molecular phylogeny of the polystichoid ferns in Asia based on rbcL sequences[J]. SYSTEMATIC BOTANY,2007,32(1):26-33.
APA Lu, Jin-Mei,Barrington, David S.,&Li, De-Zhu.(2007).Molecular phylogeny of the polystichoid ferns in Asia based on rbcL sequences.SYSTEMATIC BOTANY,32(1),26-33.
MLA Lu, Jin-Mei,et al."Molecular phylogeny of the polystichoid ferns in Asia based on rbcL sequences".SYSTEMATIC BOTANY 32.1(2007):26-33.
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