DISSERTATION RESEARCH: Evolution of a novel floral organ in Dipsacaceae: consequences for dispersal and diversification

论文研究：续断科一种新型花器官的进化：对传播和多样化的影响

• 批准号: 0710269
• 负责人: Michael Donoghue
• 金额: $ 1.2万
• 依托单位: Yale University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-07-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0710269&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Evolution; novel; floral

Evolution of a novel floral organ in Dipsacaceae: Consequences for dispersal and diversificationThis project is designed to elucidate the origin and consequences of morphological novelty using the flowering plant group Dipsacaceae (Dipsacales) as a study system. Dipsacaceae are characterized by an "epicalyx," a novel organ that subtends the flower and functions in fruit dispersal. Much of the diversity in Dipsacaceae relates directly to the epicalyx and different morphologies are associated with different dispersal mechanisms. These observations suggest that the epicalyx functioned as a "key innovation" that spurred the adaptive radiation of the Dipsacaceae around the Mediterranean basin. A detailed molecular phylogenetic study of the Dipsacaceae will be conducted to critically test this "key innovation" hypothesis, while also taking into account the possible influence of biogeography on the evolution of morphological characters and the rate of diversification. This study will provide key phylogenetic information for a morphologically unusual and understudied group within the Dipsacales. This will yield an excellent sampling of Dipsacales as a whole and provide a valuable model for exploring a wide range of macroevolutionary issues. This project will expand collaborative ties with Italian colleagues and provide the Co-PI with training in a wide variety of rapdily developing analytical techniques that will allow her to work across traditional disciplines

续断科新型花器官的进化：扩散和多样化的后果该项目旨在以开花植物群续断科（续断目）作为研究系统，阐明形态新颖性的起源和后果。续断科的特征是“附萼”，这是一种包住花并在果实传播中发挥作用的新器官。续断科的大部分多样性与副萼直接相关，不同的形态与不同的扩散机制相关。这些观察结果表明，副萼起到了“关键创新”的作用，刺激了地中海盆地周围续断科的适应性辐射。 将对续断科进行详细的分子系统发育研究，以批判性地检验这一“关键创新”假设，同时也考虑到生物地理学对形态特征进化和多样化速率的可能影响。这项研究将为续断目中一个形态上不寻常且未被充分研究的群体提供关键的系统发育信息。这将产生整个续断目的优秀样本，并为探索广泛的宏观进化问题提供有价值的模型。 该项目将扩大与意大利同事的合作关系，并为联合首席研究员提供各种快速发展的分析技术的培训，使她能够跨传统学科开展工作