title: Paraphyly of Cyrtomium (Dryopteridaceae): evidence from rbcL and trnL-F sequence data.
abstract: Cyrtomium is an Asiatic genus characterized by anastomosing veins with included veinlets, and comprises about 40 species. We sequenced rbcL and trnL-F sequences of 19 species of Cyrtomium and eight species from related genera in order to elucidate a molecular phylogeny of the genus using maximum-parsimony methods. The phylogenetic trees did not agree with traditional classifications. Cyrtomium was resolved as paraphyletic, and a clade including subseries Balansana of Cyrtomium, Cyrtogonellum, Polystichum subacutidens and Cyrtomidictyum (the BCPC clade) and a second one containing Cyrtomium sensu stricto were monophyletic. The results also implied that: (1) C. uniseriale was synonymous with C. balansae; (2) C. falcatum was likely the female parent of C. devexiscapulae; and (3) based on the rbcL and trnL-F sequence data, C. nephrolepioides and C. grossum were the female parents of C. shingianum and C. chingianum, respectively, although other evidence is needed for the confirmation of this hypothesis.
authors.affiliation: Laboratory of Plant Biodiversity and Biogeography, Kunming Institute of Botany, Chinese Academy of Sciences, Heilongtan, Kunming, Yunnan Province, 650204, People's Republic of China.
authors.forename: Jin-Mei
authors.initials: JM
authors.lastname: Lu
authors.forename: De-Zhu
authors.initials: DZ
authors.lastname: Li
authors.forename: Lian-Ming
authors.initials: LM
authors.lastname: Gao
authors.forename: Xiao
authors.initials: X
authors.lastname: Cheng
authors.forename: Ding
authors.initials: D
authors.lastname: Wu
mesh_terms: D032491:Dryopteridaceae / Q000145:classification / Q000235:genetics*; D010802:Phylogeny; D010940:Plant Proteins / Q000235:genetics*; D012273:Ribulose-Bisphosphate Carboxylase / Q000235:genetics*; D013045:Species Specificity
chemical_list: D010940:Plant Proteins; C101625:RbcL protein, plastid; D012273:Ribulose-Bisphosphate Carboxylase