DISSERTATION RESEARCH: Hedyotis L. (Rubiaceae) in Asia: Phylogeny, Character Evolution, and Biogeography

论文研究：亚洲白花花草属（茜草科）：系统发育、性状进化和生物地理学

• 批准号: 1210781
• 负责人: Wayne Hynes
• 金额: $ 1.45万
• 依托单位: Old Dominion University Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-06-01 至 2014-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1210781&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Hedyotis; L.; Rubiaceae

The plant genus Hedyotis is a group of nearly 180 Asian-Pacific tropical species in the plant family Rubiaceae (the coffee family). Hedyotis and its related genera are currently taxonomically ill-defined groups. Hedyotis exhibits high levels of species endemism, with many species occurring on a single island or mountain, and its closest relatives occur in Africa and America. Additionally, some of the island and high elevation species in the Hedyotis-Oldenlandia complex have evolved from herbaceous ancestors into small trees. This is known as secondary woodiness, and is often specific to islands or island-like habitats. By building a phylogeny using DNA and morphological data, this project aims to improve the classification of the group, investigate broader issues of ancient dispersal patterns, and examine the evolutionary development of secondary woodiness in the Asian and Pacific species. This project will resolve the classification of the fourth largest plant family (Rubiaceae), and improve plant collections and botanical knowledge from five under-collected biodiversity hotspots. Additionally, this research will build partnerships with international institutions in six countries, foster collaborations between scientists, and train students in phylogenetics, botany, and taxonomy.

植物属 Hedyotis 是茜草科（咖啡科）植物中近 180 种亚太热带植物的一个组。白花草及其相关属目前在分类学上是不明确的类群。白花草表现出高度的物种特有性，许多物种出现在一个岛屿或山上，其近亲出现在非洲和美洲。此外，白花草-奥尔登兰迪亚复合体中的一些岛屿和高海拔物种已从草本祖先进化为小乔木。这被称为次生木质，通常是岛屿或类似岛屿的栖息地所特有的。通过使用 DNA 和形态学数据构建系统发育学，该项目旨在改进该类群的分类，研究古代扩散模式的更广泛问题，并研究亚洲和太平洋物种次生木质的进化发展。该项目将解决第四大植物科（茜草科）的分类问题，并改善五个收集不足的生物多样性热点地区的植物收藏和植物学知识。此外，这项研究还将与六个国家的国际机构建立合作伙伴关系，促进科学家之间的合作，并对学生进行系统发育学、植物学和分类学方面的培训。