丝瓜藓属(Pohlia Hedw.)的系统位置及属内种间关系探讨  

Phylogenetic Position of the Genus Pohlia Hedw.:Evidence from the Nuclear Ribosomal DNA ITS Region

作　　者：汪琛颖[1,2] 赵建成[1] 

机构地区：[1]河北师范大学生命科学学院,石家庄050016 [2]郑州师范高等专科学校生命科学系,郑州450044

出　　处：《植物研究》2010年第5期517-526,共10页Bulletin of Botanical Research

基　　金：国家自然科学基金资助项目(30670152);河北省自然科学基金资助项目(C2008000158)

摘　　要：丝瓜藓属的系统地位及属内种间关系存在争议。本研究首次利用核糖体DNA内转录间区(ITS)序列数据对丝瓜藓属及相关科属植物进行系统发育分析。最大简约法,最大似然法及贝叶斯推论法构建的系统树均表明,ITS序列数据不支持将丝瓜藓属划归提灯藓科。丝瓜藓属植物与缺齿藓属植物构成一个单系分支。Brotherus(1903),Ochi(1959),Shaw(1984)及Hill等(2006)等学者提出的丝瓜藓属属下分类均不是单系类群。Pohlia Hedw. has been placed in three different families, the Bryaceae, the Mniaceae, and the Mielichhoferiaceae. In this paper, phylogenetic relationships of the genus were examined based on DNA sequences of the ITS region of nuclear ribosomal DNA. Phylogenetic analysis in MP, ML and BI trees all revealed that the genus of Pohlia should not be included in Mniaceae, the species of Pohlia are the closer relative of the species of Mielichhoferiaeeae, the formerly classification of sections in the genus may need to be reconsidered.

关 键 词：丝瓜藓属 ITS序列 系统发育分析 真藓科 提灯藓科 缺齿藓科 

分 类 号：Q944.1[生物学—植物学]