Systematic Studies of Perennial Species of Sunflowers (Helianthus)

多年生向日葵品种（向日葵）的系统研究

• 批准号: 9019158
• 负责人: Edward Schilling
• 金额: $ 10万
• 依托单位: University of Tennessee Knoxville
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-10-15 至 1994-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9019158&HistoricalAwards=false
• 关键词: Systematic; Studies; Perennial; Species; Sunflowers

Systematic studies of perennial species of Helianthus will follow two major lines of research. One is to use data from analysis of chloroplast DNA restriction site mutations to clarify several phylogenetic problems. These include the relationship of Helianthus to the putatively related genus, Phoebanthus, the relationships among the infrageneric groups of Helianthus (sects. Helianthus, Ciliares, and Atrorubentes), and the relationships of two enigmatic species, H. porteri and H. agrestis. A second major line of research will be to use data from chemistry, chloroplast DNA and nuclear ribosomal DNA restriction site analysis and isozymes to clarify selected situations that involve hybridization or polyploidy in species of the genus that occur in the southeastern United States. The results of the project will be to provide a firm phylogeny for Helianthus as a basis to understand topics such as biogeography and chemical evolution in the genus, and to clarify the systematics of the genus in the southeastern United States.

多年生向日葵的系统研究将遵循两个主要的研究方向。一是利用叶绿体DNA限制性内切位点突变的分析数据来澄清几个系统发育问题。这些问题包括太阳花与推定相关属的关系，太阳花属（Phoebanthus），太阳花属群之间的关系。Helianthus， Ciliares和Atrorubentes)，以及两个神秘物种H. porteri和H. agrestis的关系。第二个主要研究方向将是利用化学数据、叶绿体DNA和核糖体DNA限制性位点分析和同工酶来澄清发生在美国东南部的该属物种中涉及杂交或多倍体的选定情况。该项目的结果将为向日葵的系统发育提供一个坚实的基础，作为理解该属的生物地理学和化学进化等主题的基础，并澄清该属在美国东南部的系统学。