DISSERTATION RESEARCH: Tracking Timing of Migration and Diversification Across North and South America in Agalinis (Orobanchaceae)

论文研究：追踪北美洲和南美洲 Agalinis（列当科）的迁徙和多样化时间

• 批准号: 1310863
• 负责人: Douglas Soltis
• 金额: $ 1.31万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-05-01 至 2015-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1310863&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Tracking; Timing; Migration

The underlying evolutionary history, or phylogeny, of organisms from diverse biomes provide a framework for understanding where these lineages originated geographically, how they have subsequently diversified, and how these biomes were assembled in the past. This project explores evolutionary relationships in Agalinis (Orobanchaceae), a flowering plant genus of approximately 70 species with a New Word distribution and with South American centers of diversity in two recognized biodiversity hotspots: the Andes and the Cerrado of Brazil. Agalinis is an ideal clade for investigating historical biogeography and diversification between the two continents and between the Andes and Cerrado, as well as patterns of morphological evolution following a rapid radiation into South America. In addition to using standard phylogenetic and divergence time estimation approaches, this research will also employ a newly developed multi-species coalescent approach for estimation of the species tree and divergence times within the South American clade of Agalinis. Our goals are to: 1) assemble the first broadly-sampled phylogeny of Agalinis, 2) estimate the species tree and divergence times, using both standard phylogenetic and new coalescent methods for the South American clade, 3) investigate migration and diversification between North and South America and between the Andes and the Cerrado within South America, with efforts to correlate potential shifts in diversification with geological and paleoclimatic reconstructions, and 4) investigate morphological character evolution. The utility of this research extends beyond the systematics of Agalinis and will be a valuable contribution not only to studies of diversification and character evolution of lineages in South America, but also to comparative phylogenetic research in the Neotropics. This project relies extensively on established international collaborations, particularly in Brazil. The results of the research will be disseminated through peer-reviewed publications, presentations at national conferences, and through the my-plant.org web portal. Photos of plants in the field have already been deposited with the Parasitic Plant Collection, a website which provides information to researchers and the public. The co-PI is supervising an undergraduate student on a small project overlapping with the research outlined here, and will mentor a Brazilian undergraduate in a lab exchange from USP in 2013. Additionally, the co-PI will continue her involvement with the NSF-supported Planting Science online high school mentoring program, furthering the educational impact of the proposed research.

来自不同生物群落的生物的潜在进化史或系统发育提供了一个框架，以理解这些谱系在地理位置上起源于地理位置，它们后来如何多样化以及这些生物群落如何在过去组装中。该项目探索了阿加利尼（Orobanchaceae）的进化关系，这是一个大约70种具有新单词分布的开花植物属，并在两个公认的生物多样性热点中与南美多样性中心：安第斯山脉和巴西的塞拉多。 Agalinis是研究两大洲之间以及安第斯山脉和塞拉多之间的历史生物地理学和多样化的理想进化枝，以及在迅速辐射到南美后形态进化的模式。除了使用标准的系统发育和差异时间估计方法外，这项研究还将采用新开发的多种物种合并方法来估计阿加利尼南美洲的树种树木和分歧时间。我们的目标是：1）使用标准的系统发育和新的合并方法来估计物种树和差异时间的第一个广泛采样的系统发育；研究形态特征进化。这项研究的效用范围超出了阿加利尼菌的系统学，不仅对南美谱系的多样化和性格演变的研究，而且对新型新型技术的比较系统发育研究都将是一个有价值的贡献。该项目广泛依赖于既定的国际合作，尤其是在巴西。该研究的结果将通过经过同行评审的出版物，国家会议的演示以及my-plant.org Web门户进行传播。该领域的植物照片已经存放在寄生植物收藏中，该网站向研究人员和公众提供信息。 Co-Pi正在监督一名本科生，其中一个与此处概述的研究重叠的小型项目，并将在2013年在USP的实验室交流中指导巴西本科生。此外，Co-Pi将继续与NSF支持的种植科学在线辅导计划有关，以培养拟议的研究。