The Molecular Systematics of the Tribe Anthemidae (Asteraceae)

将通过分子技术研究菊科部落（菊科，向日葵科）的进化和系统关系。 使用代表性物种，将使用以下方法评估叶绿体基因组的变异：1) 比较限制性位点作图，以及 2) 基因 ORFk（开放阅读框 k）的测序。 将使用可用的软件包（包括 PAUP，使用简洁性的系统发育分析；PHYLIP，系统发育推理包等）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，并对一组重要的开花植物的性状进化（包括形态、育种系统和染色体数量）提供独立评估。 菊科是菊科中的一个重要族群，是属数第五大族、物种数第七大族。 它具有重要的经济意义，许多物种可用作杀虫剂、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物种，具有重要的生态意义。 这个重要部落的进化关系仍然模糊，广泛的多样性和趋同性是促成因素。 此外，向日葵科是最大、最多样化、最成功的开花植物科之一，长期以来一直为所有分类水平的系统研究提供模型。 这一传统一直延续到使用该家族进行分子系统学的开创性研究中。 这项研究将有助于更好地了解开花植物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.