EAPSI: Molecular Phylogeny and Biogeography of Series Chinensis (Iridaceae)

系统发育方法是理解进化关系的重要工具，并可以为地理范围的起源和变化提供可能的解释。 该奖项支持研究亚洲鸢尾的地理起源和进化关系。该项目将重点关注主要分布在中国东北，但也在韩国和日本发现的小鸢尾。该系列中的物种数量是未知的，因为作者没有同意包括一些物种。我们的了解这些和其他中国种的分布是有限的，因为最近在亚洲的系统工作集中在中国的植物群项目，调查现有的数据库，从主要的中国植物标本馆产生一个整体帐户的分类群目前。本研究将透过田野调查，分析新的和现有的分布数据，探讨系列的分布。本研究将与中国科学院植物研究所的王晓泉教授合作，利用系统发育学方法，探讨：1）哪些亚洲物种应被纳入系列1; 2）系列1物种之间的系统发育关系; 3）系列1在中国的起源、扩散和多样性。分子标记将被应用于测试系统发育关系，这些结果将被用来测试有关地理分布的假设。利用最大似然法和贝叶斯统计方法对核和叶绿体DNA标记进行测序，以重建染色体组。研究结果将被用作检验地理多样化模式假设的框架。东亚和太平洋暑期研究所项目下的这一奖项支持美国研究生的暑期研究，

Phylogenetic methods are essential tools that allow for an understanding of evolutionary relationships and can provide a possible explanation for origins and changes in geographic ranges. This award support research to investigate geographic origins and evolutionary relationships of Asian Iris. The project will focus on series Chinensis, small irises that are distributed mainly in northeast China, but also found in Korea and Japan. The number of species in the series is unknown because authors have not agreed on the inclusion of some species. Our understanding of the distribution of these and other Chinese species is limited because recent systematic work in Asia has focused on the Flora of China project, which surveyed existing databases from major Chinese herbaria to produce an overall account of taxa present. This research will investigate the biogeography of series Chinensis through fieldwork, and analyses of new and existing distributional data. This research will be conducted in collaboration with Professor Xiao-Quan Wang at the Chinese Academy of Science Institute of Botany in Beijing, China.Using phylogenetic approach, the project will investigate: 1) which Asian species should be included in series Chinensis; 2) phylogenetic relationships among series Chinensis species; and 3) the origin, dispersal and diversification of the series in China. Molecular markers will be applied to test phylogenetic relationships and these results will be used to test hypotheses about geographic distribution. Nuclear and chloroplast DNA makers will be sequenced for phylogeny reconstruction using maximum likelihood and Bayesian statistical methods. The resulting phylogeny will be used as a framework for testing hypothesis on patterns of geographic diversification.This award under the East Asia and Pacific Summer Institutes program supports summer research by a U.S. graduate student and is