Dissertation Research: Molecular Evolution, Adaptive Radiation, and Geographic Speciation in Banksia (Proteaceae)

论文研究：山龙眼（山龙眼科）的分子进化、适应性辐射和地理物种形成

• 批准号: 9801572
• 负责人: Thomas Givnish
• 金额: $ 1万
• 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: 1998
• 资助国家: 美国
• 起止时间: 1998-06-15 至 2000-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9801572&HistoricalAwards=false
• 关键词: Dissertation; Research; Molecular; Evolution; Adaptive

9801572 Givnish This study seeks to make an important contribution toward describing the patterns of evolution in a striking example of continental adaptive radiation. The genus Banksia (Proteaceae) includes 79 species of trees, shrubs, and prostrate woody mats that occur only in Australia and are established in a broad range of climates and soils. Some characters vary greatly among the species, such as the leaves, which may vary from entire to spinose, and these plants display the widest range in lifespan known among flowering plants. In addition several co-occuring pairs of species in Banksia and the related genus Dryandra are remarkably convergent in leaf and flower form. A phylogeetic tree will be developed for Banksia and relatived genera based on variation in chloroplast and nuclear DNA. Once resolved the tree will be used for the following purposes: 1) analysis of the agreement between our DNA data and a recent set of morphological data with the aim of obtaining a classification of Banksia based on both kinds of information; 2) evaluation of the history of species formation within and between different geographic areas; 3) relating evolutionary shifts in plant form and ecology to inferred historical shifts to different climates and/or substrates; and 4) determination of whether the strikingly similarity between coexisting pairs of Banksia and Dryandra species represents evolutionary convergence under similar ecological conditions or the sharing of recent common ancestors. The proposed study will shed light on the history, geographic distribution, and ecology of one of the most diverse and characteristic groups of Australia's vegetation.

9801572 Givnish这项研究旨在在大陆自适应辐射的引人注目的例子中为描述进化的模式做出重要贡献。 河岸（proteaceae）包括79种仅在澳大利亚发生的树木，灌木和俯卧式木质垫子，并在广泛的气候和土壤中建立。 在物种中，一些特征在叶子中差异很大，叶子可能因整个纺纱而异，这些植物在开花植物中的寿命中显示最大的范围。 另外，河岸和旱地属的几对物种对叶子和花形形式都非常收敛。 基于叶绿体和核DNA的变化，将开发植物树和相对属的植物树。 一旦解决，树将用于以下目的：1）分析我们的DNA数据和最近的一组形态数据之间的一致性，目的是基于两种信息获得班克西亚的分类； 2）评估不同地理区域内和之间物种形成的历史； 3）将植物形式和生态学的进化转变与推断为不同气候和/或底物的历史转变； 4）确定共存的河岸和干兰德拉物种之间的显着相似性是在相似的生态条件下的进化融合或最近共同祖先的共享。 拟议的研究将阐明澳大利亚植被最多样化和特征群体之一的历史，地理分布和生态。