Dissertation Research: Phylogeny and Biogeography of Paeonia (Paeoniaceae)

[321616]史泰西观赏牡丹和它们的野生近缘种，被归入牡丹属，多年来一直使植物学家着迷和困惑。结合原始和先进的形态特征，牡丹在系统发育上与许多不同的群有关，但它们的进化关系仍未解决。在俄亥俄州立大学的指导老师Tod Stuessy博士的指导下，研究生Tao Sang正在新大陆和旧大陆进行广泛的实地工作，为该属约30个物种的详细形态和dna分析收集材料。来自叶绿体DNA和核糖体DNA的新分子数据有望为系统发育推断提供可靠的特征。反过来，从形态学和分子证据中得到的严格的系统发育将允许分析北半球牡丹目前分布的有趣的不相交的地理范围。芍药是一种分布广泛的具有观赏和药用价值的灌木植物，为研究芍药的系统发育和生物地理学提供了新的分子和形态学证据。

9321616 Stuessy The ornamental peonies and their wild relatives, placed in the isolated genus Paeonia, have fascinated and puzzled botanists for many years. Combining primitive and advanced morphological features, peonies have been related phylogenetically to numerous disparate groups of dicots but their evolutionary relationships remain unresolved. Under the direction of faculty adviser Dr. Tod Stuessy at Ohio State University, graduate student Tao Sang is conducting extensive field work in both the New and Old Worlds to amass materials for detailed morphological and DNA-based analyses of the ca. 30 species in the genus. New molecular data from chloroplast DNA and nuclear ribosomal DNA promise to yield robust characters for phylogenetic inference. In turn, a rigorously grounded phylogeny from morphological and molecular evidence will permit the analysis of intriguing disjunct geographical ranges in the present distribution of peonies in the northern hemisphere. New molecular and morphological evidence will be collected to study the phylogeny and biogeography of Paeonia, a fascinating group of widely distributed shrubs, with ornamental and medicinal properties.