Phylogeny of Ptychostomum (Bryaceae,Musci) inferred from sequences of nuclear ribosomal DNA internal transcribed spacer (ITS) and chloroplast rps4  

作　　者：Chen-Ying WANG Jian-Cheng ZHAO 

机构地区：[1]College of Life Science, Hebei Normal University, Shijiazhuang 050016, China [2]Department of Life Science, Zhengzhou Teachers College, Zhengzhou 450044, China

出　　处：《Journal of Systematics and Evolution》2009年第4期311-320,共10页植物分类学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(grantno.30670152);the National Infrastructure of Natural Resources for Science and Technology(grant no.2005DKA21403);the Natural Science Foundation of Hebei Province,China(no.C2008000158)

摘　　要：The phylogeny of Ptychostomum was first spacer （ITS） region of the nuclear ribosomal （nr） DNA DNA rps4 sequences. Maximum parsimony, maximum undertaken based on analysis of the internal transcribed and by combining data from nrDNA ITS and chloroplast likelihood, and Bayesian analyses all support the conclusion that the reinstated genus Ptychostomum is not monophyletic. Ptychostomum funkii （Schwagr.） J. R. Spence （≡ Bryum funkii Schwaigr.） 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 Mull. Hal. （≡ B. inclinatum （Brid.） Turton≡ Bryum archangelicum Bruch ＆ Schimp.）, Bryum lonchocaulon Mull. Hal., Bryum pallescens Schleich. ex Schwaigr., and Bryum pallens Sw. to Ptychostomum.The phylogeny of Ptychostomum was first spacer （ITS） region of the nuclear ribosomal （nr） DNA DNA rps4 sequences. Maximum parsimony, maximum undertaken based on analysis of the internal transcribed and by combining data from nrDNA ITS and chloroplast likelihood, and Bayesian analyses all support the conclusion that the reinstated genus Ptychostomum is not monophyletic. Ptychostomum funkii （Schwagr.） J. R. Spence （≡ Bryum funkii Schwaigr.） 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 Mull. Hal. （≡ B. inclinatum （Brid.） Turton≡ Bryum archangelicum Bruch ＆ Schimp.）, Bryum lonchocaulon Mull. Hal., Bryum pallescens Schleich. ex Schwaigr., and Bryum pallens Sw. to Ptychostomum.

关 键 词：Bryum molecular phylogeny nuclear ribosomal DNA internal transcribed spacer sequences Ptychostomum rps4 sequences. 

分 类 号：Q949.758.8[生物学—植物学] S888.3[农业科学—特种经济动物饲养]