Evolution of the Atacama Desert flora: Insights from phylogeographic studies on Oxalis and Viola

阿塔卡马沙漠植物区系的演变：酢浆草和堇菜系统发育地理学研究的见解

• 批准号: 38787099
• 负责人: Professorin Dr. Susanne Sabine Renner
• 金额: --
• 依托单位: Department of Biology
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/38787099?language=en
• 关键词: Evolution; Atacama; Desert; flora; Insights

The proposed research will use phylogenetic and phylogeographic approaches to address hypotheses about the evolution of the flora of the Atacama Desert. These hypotheses derive from the well-constrained Miocene age of this desert, the type and geographic direction of its drainage patterns, and its proximity to major centres of Andean and Southern Cone plant diversity. Using molecular genetic data for species of Viola and Oxalis endemic to the Atacama coastal fog desert, we will investigate where their closest relatives occur, what the major directions of geographic spread are, and which effects regional barriers, such as the East-West-running water drainage canyons known as quebradas, have on population structure and species diversity. Preliminary data demonstrate the feasibility of an approach that will utilize chloroplast and nuclear DNA sequences, microsatellites, and AFLP data.

拟议的研究将使用系统发育和系统发育地理学方法来解决有关阿塔卡马沙漠植物区系进化的假设。这些假设源自该沙漠严格限制的中新世时代、其排水模式的类型和地理方向，以及它靠近安第斯山脉和南锥体植物多样性的主要中心。利用阿塔卡马沿海雾沙漠特有的堇菜属和酢浆草属物种的分子遗传数据，我们将调查它们的近亲发生在哪里、地理传播的主要方向是什么，以及区域障碍（例如被称为克布拉达的东西向排水峡谷）对种群结构和物种多样性的影响。初步数据证明了利用叶绿体和核 DNA 序列、微卫星和 AFLP 数据的方法的可行性。