Dissertation Research: Molecular Systematics of Porroglossum orchids: Phylogenetics, Floral Snap-Trap Kinematics, and Fragrance

论文研究：Porroglossum 兰花的分子系统学：系统发育学、花捕捉运动学和香味

• 批准号: 1601041
• 负责人: Kenneth Cameron
• 金额: $ 1.96万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-05-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1601041&HistoricalAwards=false
• 关键词: Dissertation; Research; Molecular; Systematics; Porroglossum

This project will study the evolutionary relationships of Porroglossum, an endangered Neotropical orchid genus are distributed in the Andes. The flowers of Porroglossum are unique because the labellum or 'lip' actively snaps inward when touched in order to trap pollinators and ensure successful pollination. The research will combine modern molecular approaches, high-speed videography, and floral fragrance sampling to gain a multifaceted understanding of the evolutionary relationships within the group and the processes underlying its diversification. This project will train both undergraduate and graduate students in modern molecular systematics techniques, including members of under-represented groups, and will enhance collaborations with orchid researchers in Ecuador.This project aims to fully resolve phylogenetic relationships within the Neotropical orchid genus Porroglossum. Researchers will use reduced representation genome sequencing (e.g., genotyping by sequencing) to collect a large number of SNPs from each species within the genus. The project also will use high-speed videography to examine floral snap-trap kinematics among species of Porroglossum. Velocity, acceleration, and kinetic energy data will be collected from high-speed videos of the active floral snap-traps and mapped onto the fully resolved phylogenetic tree, and phylogenetic signal will be estimated for each data type. Lastly, this research will employ dynamic headspace adsorption and a gas chromatography/mass spectrometry instrument to investigate the patterns of floral fragrance evolution within Porroglossum.

该项目将研究分布于安第斯山脉的濒危新热带兰属 Porroglossum 的进化关系。 Porroglossum 的花很独特，因为唇瓣或“唇”在受到触摸时会主动向内折断，以捕获传粉者并确保成功授粉。该研究将结合现代分子方法、高速摄像和花香采样，以多方面了解该群体内部的进化关系及其多样化背后的过程。该项目将对本科生和研究生进行现代分子系统学技术培训，包括代表性不足群体的成员，并将加强与厄瓜多尔兰花研究人员的合作。该项目旨在全面解决新热带兰花属 Porroglossum 内的系统发育关系。研究人员将使用简化代表性基因组测序（例如，通过测序进行基因分型）从属内的每个物种收集大量 SNP。该项目还将使用高速摄像来检查 Porroglossum 物种之间的花卉捕捉运动学。将从活动花卉捕捉器的高速视频中收集速度、加速度和动能数据，并将其映射到完全解析的系统发育树上，并对每种数据类型估计系统发育信号。最后，本研究将采用动态顶空吸附和气相色谱/质谱仪器来研究 Porroglossum 内花香演化的模式。