基于核核糖体DNA ITS序列的真藓科系统发育新证据(英文)  

New Evidence of Phylogeny in Bryaceae(Musci) Based on the ITS Region

作　　者：汪琛颖[1] 李大林 赵建成[3] 

机构地区：[1]郑州师范学院生命科学系,郑州450044 [2]河北省塞罕坝机械林场,围场068466 [3]河北师范大学生命科学学院,石家庄050016

出　　处：《植物研究》2011年第6期664-673,共10页Bulletin of Botanical Research

基　　金：supported by the National Natural Science Foundation of China(31070184/C020202);by Science and Technology Project of Henan Province(No.112300410018)

摘　　要：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。The Bryaceae phylogeny was reconstructed based on the internal transcribed spacer（ITS） region of the nuclear ribosomal DNA.Both Maximum parsimony and Bayesian inference analyses of ITS sequences revealed two well supported ingroup clades.One lineage contained Pohlia species whereas the other lineage contained species from five other genera—Rhodobryum,Brachymenium,Bryum,Plagiobryum and Anomobryum.Inconsistent with previous chloroplast DNA phylogenies,the ITS tree showed that the genus Pohlia was not more closely related to the outgroup family Mniaceae than to Bryaceae.In the other lineage,some Bryum species,such as B.algovicum,B.capillare,B.pallescens,B.pallens,B.pseudotriquetrum,B.uliginosum,B.amblyodon,B.caespiticium and B.lonchocaulon,clustered with high support with Plagiobryum zierii,which was also suggested by other molecular datasets.Based on the ITS tree,we supported the proposed shift for these Bryum species and Plagiobryum zierii to the genus Ptychostomum.

关 键 词：真藓科 ITS 系统发育 丝瓜藓属 Ptychostomum 

分 类 号：Q944.1[生物学—植物学]