DISSERTATION RESEARCH: Phylogeny and Biogeography of Euphorbiaceae Tribe Crotoneae

论文研究：大戟科巴豆族的系统发育和生物地理学

• 批准号: 0508725
• 负责人: Kenneth Sytsma
• 金额: --
• 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: 2005
• 资助国家: 美国
• 起止时间: 2005-06-15 至 2007-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0508725&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Phylogeny; Biogeography; Euphorbiaceae

This study will use DNA sequence-based phylogenetic analyses and molecularclock calibrations to reconstruct the phylogeny and biogeography of the Crotoneae tribe(Euphorbiaceae). The largest genus in this group is Croton, with 1,200 to 1,300 speciesworldwide, which previous nonmolecular studies placed sister to an Old World group ofEuphorbiaceae. Recent molecular work shows instead that Croton is allied to eight muchsmaller New World genera in a redefined Crotoneae tribe. Croton remains monophyleticexcept for one small South American section, and the Old World members are embeddedwithin New World lineages of the genus. Half of the remaining genera of Crotoneae areendemic to the Caribbean basin and the other half are South American. Many Crotoneaetaxa are rare and therefore of conservation concern. Our study will focus on theCaribbean region and how Croton and its closest relatives evolved in the New World.The broader impacts of the project include training of the co-PI (Ph.D. student),active collaboration with investigators in the U.S., Mexico, Cuba, and Brazil,participation of undergraduates in the research, enhancing knowledge of plant groups inCaribbean biogeography, and research on the evolution of a giant, complex genus.

这项研究将使用基于DNA序列的系统发育分析和分子校准来重建Crotoneae部落的系统发育和生物地理学（Euphorbiaceae）。该组中最大的属是Croton，有1,200至1,300种物种Worldwide，此前的非分子研究使姐妹成为了一个旧世界组的ofeuphorbiaceae。最近的分子工作表明，在重新定义的Crotoneae部落中，Croton与八个Macemaller New World Genera结盟。 Croton仍然是南美小区域的Monophyleticexcept，旧世界成员嵌入了该属的新世界谱系。剩下的crotoneae属的一半是加勒比海盆地和另一半是南美洲。许多Crotoneaetaxa很少见，因此存在保护。我们的研究将重点关注Tecaribbean地区，以及Croton及其最亲密的亲戚在新世界中如何发展。该项目的更广泛影响包括对Co-Pi（Ph.D.学生）的培训，与美国，墨西哥，古巴和巴西的研究人员的积极合作，与研究，对研究，对研究的知识，研究，研究，研究，研究，研究，研究，研究，研究，研究，研究，研究，并增强了研究的研究，并提高了研究的研究。属。