Supplement for Science in Developing Countries Program: The Systematics and Evolution of the Genus Corpopsis (Asteraceae) in South America

9315527 Crawford该项目支持埃塞俄比亚阿迪斯大学的Tadesse Mesfin博士参与由俄亥俄州州立大学的丹尼尔·克劳福德博士领导的植物分子遗传学研究（NSF Grant INT-9025030），研究金鸡菊属（菊科）的系统学和进化。 南美洲和东非都是金鸡菊多样性的中心，与北美洲的数量相当或超过北美洲。 这一合作部分将扩大工作范围，超越北美和南美类群，调查北美金鸡菊与非洲植物的关系，这些植物被不同地分配给鬼针草或金鸡菊。 希望这位来访的科学家能获得有助于金鸡菊属分支分析的形态特征，并选择大属鬼针草和几个相关属的代表。 参观者将考察美国几个植物标本馆的藏品，并将介绍一些基本的分子技术正在使用的主机科学家的实验室，以适用于这个问题。 这些包括等位酶、叶绿体DNA的限制性位点分析和RAPD。 这项合作将提高对金鸡菊在其发生的每个地理区域以及在世界范围内的了解，包括其起源，进化和地理学。 对这一大而广布的属的进一步了解与非洲倡议对生物多样性研究合作的强调是一致的，并有望使合作伙伴及其上级机构受益。 此外，该项目将有助于建立一个长期研究网络，将非洲、北美洲和南美洲三大洲的科学家联系起来。 ***

9315527 Crawford This project supports the 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. This collaborative component will expand the work beyond North and South American taxa to investigate the relationship of North American Coreopsis to African plants that have been variously assigned to Bidens or Coreopsis. It is hoped that the visiting scientist can obtain morphological characters useful in a cladistic analysis of Coreopsis and selected representatives of the large genus Bidens and several related genera. The visitor will examine the holdings in several herbaria in the U.S., and will be introduced to some basic molecular techniques being used in the host scientist's laboratory to apply to the problem. These include allozymes, restriction site analysis of chloroplast DNA, and RAPDs. The cooperation will improve understanding of Coreopsis in each of the geographical areas where it occurs, and also on a worldwide basis, including its origin, evolution and biogeography. Improved understanding of this large, widespread genus is consistent with the Africa Initiative 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, Africa, North America, and South America. ***