项目名称： 叉蕨科的系统发育和生物地理学研究

项目编号： No.31300183

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 生物科学

项目作者： 刘红梅

作者单位： 深圳市仙湖植物园管理处

项目金额： 22万元

中文摘要： 叉蕨科是目前几个缺乏深入研究的世界性类群之一，其系统学研究对理解薄囊蕨类完整的系统发育关系至关重要。该科全世界有8-20属，200-300种，以东南亚和中国大陆的热带亚热带地区多样性最高。叉蕨科植物形态变异复杂，与近缘科间、科下属间及属下种间分类长期存在争议。本项目立足地域优势，并基于前期研究积累，拟利用4个叶绿体片段（atpB、rbcL、rps4-trnS和trnL-F）和2个核基因（LEAFY和gapCp）重建该科的系统发育关系，结合重要形态学性状的分析，建立叉蕨科自然的分类系统；在系统发育框架下进行祖先分布区重建，结合分子钟推算，揭示洲际间断分布格局的成因。我们希望在原有的基础上，对叉蕨科的系统发育和地理分布等问题作更深入的探讨，不仅完善整个薄囊蕨类的系统发育关系，而且可望为探讨蕨类植物洲际间断分布提供一个领先案例。

中文关键词： 叉蕨科；系统发育；多基因；生物地理；间断分布

英文摘要： This project aims to uncover the phylogeny and biogeography of the derived fern family Tectariaceae. This pantropical family comprises about 200 to 300 species of which the waste majority occurs in SE Asia. The family was not generally accepted until 2006 and both the circumscription of the family and the generic classification is still poorly understood. Furthermore, untangling the relationships among members of this family hold the key to improve our understanding of the diversification of derived ferns that are closely related to the two most species rich families of ferns, the Dryopteridaceae and Polypodiaceae. This project aims to resolve three core issues concerning the Tectariaceae: the circumscription of the family,the generic classification, and the global biogeography with focus on continental disjunctions. The first issue includes the morphological definition of the family and the exclusion of species that are not nested in the Tectariaceae, whereas the second issue comprises the determination of genera that compose the Tectariaceae. The third issue concentrates on the colonization of tropical Americas and Eastern Malesia by these ferns, which likely originated in SE Asia. These three issues are addressed using a molecular phylogenetic approach that takes into account the known morphological variatio

英文关键词： Tectaraiceae；Phylogeny；multiple gene；biogeography；disjunct distribution