Collaborative: Phylogeny, Character Evolution, and Diversification of Extant Ferns

合作：现存蕨类植物的系统发育、性状进化和多样化

• 批准号: 9707087
• 负责人: Paul Wolf
• 金额: $ 9.5万
• 依托单位: Utah State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-03-15 至 2000-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9707087&HistoricalAwards=false
• 关键词: Collaborative; Phylogeny; Character; Evolution; Diversification

9707087 Wolf In a three-institution collaboration with colleagues at Chicago's Field Museum of Natural History and at the University of California at Berkeley, Dr. Paul Wolf of Utah State University is amassing a major database of molecular and morphological characters of representatives of the 30 or so families of living ferns, in order to construct an overall phylogenetic framework for ferns. Building upon the impressive results of a 1994 symposium of fern specialists, with an international team that produced preliminary results for this effort (published in 1995), Wolf and his colleagues are continuing a major DNA sequencing project for four genes, two from the chloroplast genome and two from the nucleus, that hold promise of yielding informative variation for genealogical analyses. This molecular database in turn is to be supplemented with traditional anatomical and morphological features drawn from the vegetative and reproductive parts of the same ferns analyzed for their DNA, features used standardly in their taxonomic identification and classification. A well-resolved phylogeny for ferns will facilitate future work on the patterns and sequences of character evolution in ferns, and on the Cretaceous radiation and diversification of the major group of ferns, the "polypodiaceous" group. A phylogeny also will provide a foundation for family- and genus-level taxonomic revisionary research. Using comparative methods, researchers can explore patterns of association among characters for correlated evolutionary changes, that may help explain the success or failure (extinction) of various lineages within the ferns.

小行星9707087 犹他州州立大学的保罗·沃尔夫博士与芝加哥菲尔德自然历史博物馆和加州大学伯克利分校的同事们合作，正在收集一个关于30个左右现存蕨类植物家族代表的分子和形态特征的主要数据库，以便构建蕨类植物的整体系统发育框架。在1994年蕨类植物专家研讨会的令人印象深刻的结果的基础上，一个国际小组为这项工作产生了初步结果（1995年发表），沃尔夫和他的同事们正在继续一个主要的DNA测序项目，其中两个来自叶绿体基因组，两个来自细胞核，这有望为系谱分析提供信息变异。这个分子数据库反过来又补充了传统的解剖和形态特征，这些特征来自于对同一蕨类植物的DNA进行分析的营养和生殖部分，这些特征在其分类鉴定和分类中是标准的。 一个很好的解决蕨类植物的演化史将有助于未来的工作的模式和序列的特征演化的蕨类植物，和白垩纪的辐射和多样化的蕨类植物的主要群体，“水龙骨科”组。一个系统发生学也将为科和属水平的分类学修订研究提供基础。使用比较方法，研究人员可以探索相关进化变化的特征之间的关联模式，这可能有助于解释蕨类植物中各种谱系的成功或失败（灭绝）。