The Molecular Systematics of the Tribe Anthemidae (Asteraceae)

本文将用分子技术研究菊科部落菊花科植物的进化和系统关系。使用代表性物种，叶绿体基因组的变异将通过以下方法进行评估：1)比较限制性内切位点定位，以及2)基因ORFk（开放阅读框k）测序。使用可用的软件包（包括PAUP、系统发育分析、PHYLIP、系统发育推断包等）对数据进行系统发育分析。这项研究将检验进化关系的假设，并将为一个重要的开花植物群体的特征进化（包括形态、育种系统和染色体数目）提供独立的评估。菊花科是菊科中一个重要的科，属数居世界第五位，种数居世界第七位。它在经济上很重要，有许多物种被用作杀虫剂、疟疾药物、栽培植物和草药的来源。山艾树是北美大盆地的优势种，具有重要的生态意义。这个重要部落的进化关系仍然不清楚，广泛的多样性和趋同是促成因素。此外，向日葵科是开花植物中最大、最多样化和最成功的科之一，长期以来为所有分类水平的系统研究提供了一个模型。这一传统继续与分子系统学的先驱研究使用这个家庭。这项研究将有助于我们更好地了解开花植物一个重要科和部落的进化和系统关系。

The evolutionary and systematic relationships of the Tribe Anthemideae (Asteraceae, sunflower family) will be examined with molecular techniques. Using representative species, variation in the chloroplast genome will be assessed using : 1) comparative restriction site mapping, and 2) sequencing of the gene ORFk (open reading frame k). The data will be analyzed phylogenetically using available software packages (including PAUP, Phylogenetic Analyses Using Parsimony; PHYLIP, Phylogenetic Inference Package; among others). This research will test hypotheses of evolutionary relationships, and will provide an independent assessment of character evolution (including morphology, breeding systems, and chromosome numbers) in an important group of flowering plants. The Anthemideae is an important tribe in the Asteraceae, being the fifth largest tribe in terms of number of genera, and the seventh largest in terms of number of species. It is important economically with numerous species used for sources of insecticides, malaria medicines, cultivated plants, and herbs. And it is important ecologically with sagebrush a dominant species in the Great Basin of North America. Evolutionary relationships of this important tribe remain obscure, with extensive diversity and convergence being contributing factors. Additionally, the sunflower family is one of the largest, most diverse, and successful families of flowering plants, and has long provided a model for systematic studies at all taxonomic levels. This tradition has continued with pioneering studies of molecular systematics using this family. This study will provide a greater understanding of the evolutionary and systematic relationships in an important family and tribe of flowering plants.