Systematics of an Ancient North American Lineage of Robinieae (Leguminosae)

北美古代刺槐科（豆科）的系统学

• 批准号: 9118785
• 负责人: Matthew Lavin
• 金额: $ 13.4万
• 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: 1992
• 资助国家: 美国
• 起止时间: 1992-03-01 至 1996-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9118785&HistoricalAwards=false
• 关键词: Systematics; Ancient; North; American; Lineage

The objective of this study is the revision of the fifteen species currently referred to Lennea, Hybosema, Gliricidia, and Yucaratonia. This will stabilize the generic classification of this portion of the tribe Robinieae and better estimate the phylogenetic position of these species within it. These species form a distinctive element of the dry tropical forests in North America; however, two species occur in tropical rain forest and one occurs in South America. Economic uses of these species are many and include construction materials from the wood, livestock fodder from the copious leaf production, and "living" fences around agricultural fields and private dwellings. The culmination of this study will be a monograph summarizing the classification, phylogeny, geographic distribution, and economic value of each species. An analysis of taxonomically informative restriction site mutations from the chloroplast genome will be combined with classical taxonomic methods. Further assessing the phylogenetic position of these species in the tribe Robinieae is important because an increased understanding of the phylogenetic relationships within Robinieae will have a bearing on our knowledge of the origins and biogeography of the North American tropical flora. Robinieae is one of the largest papilionoid tribes well represented in tropical and subtropical North America. Current evidence suggests it may have been derived from Asiatic ancestors during the Paleocene or Eocene rather than from South American ancestors in more recent times. Such phylogenetic studies of other plant groups centered in the North American tropics will be essential for understanding the origins of this biota.

这项研究的目的是修订目前提到的15个物种，该物种提到了Lennea，Hybosema，Gliricidia和Yucaratonia。 这将稳定robinieae的这一部分的通用分类，并更好地估计这些物种在其中的系统发育位置。 这些物种构成了北美干燥的热带森林的独特元素；但是，在热带雨林中发生了两种物种，其中一个发生在南美。 这些物种的经济用途很多，包括木材的建筑材料，大量生产的牲畜饲料以及农田和私人住宅周围的“活”围栏。 这项研究的高潮将是一部专着，总结了每个物种的分类，系统发育，地理分布和经济价值。 对叶绿体基因组的分类学信息限制位点突变的分析将与经典的分类法相结合。 进一步评估这些物种在Robinieae部落中的系统发育位置很重要，因为对Robinieae内的系统发育关系的更多了解将与我们对北美热带植物的起源和生物地理学的了解有关。 Robinieae是在热带和亚热带北美的最大木p木phion型部落之一。 当前的证据表明，它可能是从古代或始新世期间来自亚洲祖先而不是来自南美祖先的亚洲祖先的。 以北美热带为中心的其他植物群的系统发育研究对于理解这种生物群的起源至关重要。