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Phylogeny of Ptychostomum (Bryaceae, Musci) inferred from sequences of nuclear ribosomal DNA internal transcribed spacer (ITS) and chloroplast rps 4
Author(s) -
WANG ChenYing,
ZHAO JianCheng
Publication year - 2009
Publication title -
journal of systematics and evolution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.249
H-Index - 46
eISSN - 1759-6831
pISSN - 1674-4918
DOI - 10.1111/j.1759-6831.2009.00033.x
Subject(s) - internal transcribed spacer , chloroplast dna , phylogenetic tree , clade , monophyly , botany , biology , maximum parsimony , ribosomal dna , phylogenetics , chloroplast , genus , ribosomal rna , nuclear dna , genetics , gene , mitochondrial dna
The phylogeny of Ptychostomum was first undertaken based on analysis of the internal transcribed spacer (ITS) region of the nuclear ribosomal (nr) DNA and by combining data from nrDNA ITS and chloroplast DNA rps 4 sequences. Maximum parsimony, maximum likelihood, and Bayesian analyses all support the conclusion that the reinstated genus Ptychostomum is not monophyletic. Ptychostomum funkii (Schwägr.) J. R. Spence (≡ Bryum funkii Schwägr.) is placed within a clade containing the type species of Bryum , B. argenteum Hedw. The remaining members of Ptychostomum investigated in the present study constitute another well‐supported clade. The results are congruent with previous molecular analyses. On the basis of phylogenetic evidence, we agree with transferring B. amblyodon Müll. Hal. (≡ B. inclinatum (Brid.) Turton ≡ Bryum archangelicum Bruch & Schimp.), Bryum lonchocaulon Müll. Hal., Bryum pallescens Schleich. ex Schwägr., and Bryum pallens Sw. to Ptychostomum .