Phylogeny of Tribe Anthemideae (Asteraceae): Molecular and Morphological Data

[408019 .沃森]美国俄克拉何马大学的琳达·沃森博士对向日葵科的山艾科，即洋菊花科进行了广泛的分子系统发育分析，以获得分类学和谱系学研究的新数据。限制性内切酶图谱和叶绿体DNA基因测序的数据正在从来自世界各地的约1740个部落的代表中收集。这些将用于评估物种和属之间的突变差异，并构建系统发育关系的假设。反过来，这种基于分子的系统发育将与当前基于形态学的推断进行比较，并将不一致的领域与其他DNA数据集进行进一步研究。经过证实的进化史模式将为评估这个广泛分布的部落在交配系统、授粉（无论是通过风还是昆虫）、地理分布和生长形式方面的变化提供测试案例。菊花科提供了一个使用现代分子技术检查进化关系模式的机会，并与现有的基于形态学的系统发育树进行直接比较，从而评估传统分类特征的可靠性。合并的数据集将导致一个经济上和生态上重要的植物群的全面分类说明。

9408019 Watson The sagebrush tribe, Anthemideae, of the sunflower family is the focus of extensive molecular phylogenetic analyses by Dr. Linda Watson of the University of Oklahoma, to acquire new data for taxonomic and genealogical study. Data from restriction enzyme mapping and gene sequencing of chloroplast DNA are being collected from representatives of the ca. 1740 species of the tribe, from throughout the world. These will be used to assess mutational differences among species and genera, and to construct hypotheses of phylogenetic relationship. In turn, such molecule-based phylogenies will be compared with current morphology-based inferences, and areas of disagreement subjected to further study with additional DNA datasets. Corroborated patterns of evolutionary history will provide test cases for evaluating changes in mating systems, pollination (whether by wind or insects), geographic distribution, and growth form in this widespread tribe. The Anthemideae provides an opportunity to examine patterns of evolutionary relationships using modern molecular techniques and to make direct comparisons to an existing morphology-based phylogenetic tree and thereby assess the reliability of traditional taxonomic characters. The combined datasets will lead to a comprehensive taxonomic account of an economically and ecologically important group of plants.