title: Phylogeny of the lady fern group, tribe Physematieae (Dryopteridaceae), based on chloroplast rbcL gene sequences.
abstract: Nucleotide sequences of the chloroplast gene rbcL from 42 species of the fern tribe Physematieae (Dryopteridaceae) were analyzed to gain insights into the inter- and intrageneric relationships and the generic circumscriptions in the tribe. The phylogenetic relationships were inferred using the neighbor-joining and maximum-parsimony methods, and both methods produced largely congruent trees. These trees reveal that: (1) Athyrium, Cornopteris, Pseudocystopteris, and Anisocampium form a clade and Athyrium is polyphyletic; (2) Deparia sensu lato is monophyletic and Dictyodroma formosana is included in the Deparia clade; (3) Diplaziopsis forms a clade with Homalosorus, which is isolated from the other genera of the Physematieae; (4) Monomelangium is included in the monophyletic Diplazium clade; and (5) Rhachidosorus is not closely related to either Athyrium or Diplazium.
authors.affiliation: National Institute for Basic Biology, Okazaki, 38 Nishigonaka, Myodaiji-cho, 444-8585, Japan.
authors.forename: R
authors.initials: R
authors.lastname: Sano
authors.forename: M
authors.initials: M
authors.lastname: Takamiya
authors.forename: M
authors.initials: M
authors.lastname: Ito
authors.forename: S
authors.initials: S
authors.lastname: Kurita
authors.forename: M
authors.initials: M
authors.lastname: Hasebe
mesh_terms: D002736:Chloroplasts / Q000235:genetics*; D002875:Chromosomes / Q000235:genetics; D016208:Databases, Factual; D017343:Genes, Plant / Q000235:genetics; D019684:Magnoliopsida / Q000145:classification / Q000235:genetics*; D008677:Metaphase; D010802:Phylogeny; D010940:Plant Proteins / Q000235:genetics*; D012273:Ribulose-Bisphosphate Carboxylase; D017422:Sequence Analysis, DNA
chemical_list: D010940:Plant Proteins; C101625:RbcL protein, plastid; D012273:Ribulose-Bisphosphate Carboxylase