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，可以为起源和地理范围的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。该项目将重点研究主要分布在中国东北，但也在韩国和日本发现的小鸢尾系列。该系列的物种数量尚不清楚，因为作者尚未就某些物种的收录达成一致。我们对这些和其他中国物种分布的了解是有限的，因为最近在亚洲的系统工作主要集中在中国植物区系项目上，该项目调查了中国主要植物标本馆现有的数据库，以产生现有分类群的总体描述。本研究将通过野外调查、新资料和现有分布资料的分析，对中华系列的生物地理学进行调查。这项研究将与中国科学院植物研究所的王晓全教授合作进行。本项目将采用系统发育的方法研究：1)哪些亚洲物种应该归入中国种；2)中华系种间的系统发育关系；3)该系列在中国的起源、传播和多样化。分子标记将用于测试系统发育关系，这些结果将用于测试关于地理分布的假设。核和叶绿体DNA制造者将使用最大似然和贝叶斯统计方法进行系统发育重建测序。由此产生的系统发育将被用作检验关于地理多样化模式的假设的框架。该奖项隶属于东亚和太平洋暑期学院项目，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