Phylogenetic and Monographic Studies in the Tribe Aeschynomeneae: Classification, Character Evolution, and Biogeography in the Legume Family (Leguminosae)

Aeschynomeneae 部落的系统发育和专题研究：豆科 (Leguminosae) 的分类、性状进化和生物地理学

• 批准号: 9615203
• 负责人: Matthew Lavin
• 金额: $ 15.4万
• 依托单位: Montana State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-03-01 至 2000-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9615203&HistoricalAwards=false
• 关键词: Phylogenetic; Monographic; Studies; Tribe; Aeschynomeneae

9615203 Lavin The inventory and analysis of plant species, especially in the tropics, remain current challenges for botanical scientists. Dr. Matt Lavin of Montana State University is continuing his studies of the large legume family, focusing on the tribe Aeschynomeneae that includes well known food crops (like peanut, genus Arachis) and forage crops (like the genus Stylosanthes). A phylogenetic analysis using both morphological evidence and new molecular characters from DNA sequencing of nuclear ribosomal genes is proposed to construct a framework of genealogical relationships for the many genera currently placed in this papilionoid group, and to test several genera suspected of belonging within the tribe but currently placed in others. These likely include Adesmia, a genus of plants that dominate the landscape in drier regions of the Andean cordillera of Argentina and Chile, and also Dalbergia, the genus that includes species of valuable rosewood. For five selected genera within the group, Belairia, Pictetia, Chaetocalyx, Fiebrigiella, and Nissolia, estimated to encompass 40 or so species collectively, taxonomic monographs will be produced, to summarize biological knowledge of all the species in these genera, with accompanying data on habitats, geographic ranges, synonymy of scientific names, local names and uses, and identification keys. The significance of the study includes facilitating higher level phylogenetic analyses of the entire legume family by clarifying phylogenetic relationships among the Aeschynomeneae, which likely includes about 10% of the papilionoid legumes. Also, traditionally important taxonomic characters of these legumes, like free stamens and lomented pods, may be shown to be prone to higher rates of independent (parallel) evolution and secondary loss than previously thought. More accurate assessment of species diversity and geographic distribution will be possible for many of the genera in the tribe, plants of which are common components of neotropical dry forest s. The species-level monographic studies will provide data for tests of biogeographic patterns in the history of vegetation changes in Central and South America and the Caribbean.

小行星9615203 植物物种的编目和分析，特别是在热带地区，仍然是植物科学家目前面临的挑战。蒙大拿州立大学的马特·拉文博士正在继续他对豆科大家族的研究，重点是包括众所周知的粮食作物（如花生，花生属）和饲料作物（如柱花草属）的七叶树族。系统发育分析使用形态学证据和新的分子特征从DNA测序的核核糖体基因的建议，构建一个框架的系谱关系的许多属目前放置在这papiliperidae组，并测试几个属怀疑属于部落内，但目前放置在其他。这些可能包括Adesmia，一种在阿根廷和智利安第斯山脉干燥地区占主导地位的植物，以及Dalbergia，包括珍贵的红木物种。对于该组中的五个选定属，Belairia，Pictetia，Chaetocalyx，Fiebrigiella和Nissolia，估计总共包含40个左右的物种，将编制分类学专著，以总结这些属中所有物种的生物学知识，并附带有关栖息地，地理范围，科学名称同义词，当地名称和用途以及识别关键词的数据。 该研究的意义包括通过澄清可能包括约10%的蝶形花科豆科植物的七叶树族之间的系统发育关系，促进整个豆科植物家族的更高层次的系统发育分析。此外，传统上重要的分类特征，这些豆科植物，如游离雄蕊和lomented豆荚，可能会被证明是倾向于更高的独立（平行）进化率和二次损失比以前认为的。对于该族中的许多属，更准确地评估物种多样性和地理分布将是可能的，其植物是新热带干旱森林的常见组成部分。物种一级的专题研究将提供数据，用于检验中美洲、南美洲和加勒比地区植被变化历史中的地理格局。