U.S.-Ethiopia Cooperative Research: Systematic Studies of Bidens and Coreopsis (Asteraceae)

Int-9412801 Crawford该项目支持埃塞俄比亚亚的斯亚贝巴大学的Tadesse Mesfin博士继续参与俄亥俄州立大学Daniel Crawford博士正在进行的植物分子系统学研究(NSF Grant-9025030)，该研究对菊科植物属的系统学和进化进行了研究。南美洲和东非都代表着金鸡儿的多样性中心，与北美的多样性持平或超过。与埃塞俄比亚合作伙伴的合作部分正在调查北美Coreopsis与非洲植物的关系，这些植物已被不同地分配到Bidens或Coreopsis。在延长其在俄亥俄州立大学的研究合作期间，这位埃塞俄比亚科学家将追求以下目标：(1)对特别是南美洲的鬼针草物种和选定的北美和南美洲鬼针草物种进行进一步的形态和解剖学研究；(2)继续从繁殖特征特别是生殖特征方面寻找鬼针草和鬼针草的诊断特征；(3)完成对北美洲鬼针草属其余物种的描述(迄今已对44种中的27种进行了描述和勾画)；(4)制定了揭示鬼针草和鬼针草在旧大陆和新大陆的分类群中的关系的方案。这位来访的科学家正在熟悉其他技术和方法，如酶电泳法、如何为系统目的研究DNA、使用分支学生成系统发育图等。当他回到埃塞俄比亚时，他将能够在这些方面指导学生进行系统学。对这种大而广泛的属的更好的理解与非洲计划对生物多样性研究合作的重视是一致的，并有望使合作伙伴及其母机构受益。此外，该项目将有助于建立一个长期研究网络，将非洲、北美和南美三大洲的科学家联系起来。*

INT-9412801 Crawford This project supports the continued participation of Dr. Tadesse Mesfin of Addis Ababa University, Ethiopia, in an ongoing study in plant molecular phylogenetics, led by Dr. Daniel Crawford of Ohio State University, (NSF Grant INT-9025030), of the systematics and evolution of the genus Coreopsis (Asteraceae). Both South America and Eastern Africa represent centers of diversity for Coreopsis that equal or surpass that found in North America. The collaborative component with the Ethiopian partner is investigating the relationship of North American Coreopsis to African plants that have been variously assigned to Bidens or Coreopsis. During this extension of his research cooperation at Ohio State, the Ethiopian scientist will pursue the following goals: (1) make further morphological and anatomical studies on particularly South American species of Coreopsis and selected North and South American species of Bidens; (2) continue the search for diagnostic features in Bidens and Coreopsis from particularly reproductive features; (3) complete the description of the remaining species of North American species of Coreopsis (27 of the 44 species have been described and sketched so far); (4) produce a scheme that reveals the relationships between Bidens and Coreopsis in the Old versus the New World taxa. The visiting scientist is gaining familiarity with additional techniques and methods, such as enzyme electrophoresis, how to study DNA for systematic purposes, using cladistics for generating phylogenies, etc. When he returns to Ethiopia, he will be able to instruct students in these aspects of systematics. Improved understanding of this large, widespread genus is consistent with the Africa program's emphasis on biodiversity research cooperation, and promises benefits to both partners and to their parent institutions. Moreover, this project will contribute to the establishment of a longterm research network linking scientists on three continents, Af rica, North America, and South America. *** ***