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

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.

基于核核糖体DNA ITS序列的真藓科系统发育新证据(英文)

主要是利用核基因组的核糖体DNA内转录间隔区(nrDNA ITS)序列数据探讨了Buck和Goffinet(2000)限定的真藓科内各属间及属内种间的系统发育关系。ITS序列的最大简约法(MP)及贝叶斯推论(BI)分析结果显示:不支持Cox(1999)利用rps4/trnL-trnF数据分析将丝瓜藓属移至提灯藓科的结论。ITS数据分析与Holyoak(2007)利用trnL-F,trnG和atpB-rbcL序列数据分析将Bryum algovicum、B.caespiticium、B.capillare、B.pseudotrique-trum和Plagiobryum zierii划归Ptychostomum的结论一致,同时,为Spence(2005)依据形态学特征将B.pallescen、B.pallens、B.uliginosum、B.amblyodon和B.lonchocaulon划归Ptychostomum提供ITS分子证据支持。基于以上研究,建议将以上提到的真藓属种和平蒴藓移至Ptychostomum。