Molecular Systematics of Araceae

天南星科分子系统学

• 批准号: 9006749
• 负责人: James French
• 金额: $ 13.96万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-09-01 至 1994-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9006749&HistoricalAwards=false
• 关键词: Molecular; Systematics; Araceae

The plant family Araceae (the aroids) includes food plants (the taros), ornamentals, and ecologically important members of the wet tropical forests of the world such as philodendron, anthurium, and monstera. Taxonomic relationships among the estimated 100 or so genera are poorly known, in part because morphological features occur in a complex mosaic-like fashion among these plants. To acquire an independent dataset for establishing evolutionary relationships among the aroids, Dr. James French of Rutgers University is studying mutations in chloroplast DNA isolated from leaf tissues of representative species of nearly all known genera of the family. Chloroplast DNA is a useful source of genomic data because its structure and function are constrained overall; closely related plants differ by only a few mutations while more anciently diverged groups show greater numbers of mutational differences. By measuring the amounts and kinds of mutational differences in chloroplast DNA among aroid genera, Dr. French is constructing a phylogenetic tree for the family. This diagram of taxonomic relationships will help improve the classification of these plants, organizing related genera into the same tribes and subfamilies. With a phylogeny as guide, researchers can study the evolution of the complex morphology of aroids and the various breeding systems known for members of the family.

植物科（Araceae）植物科（Araceae）包括食品植物（塔罗斯群岛（Taros），装饰品）以及世界上湿的热带森林（例如Philodendron，anthurium和Monstera）的重要成员。 估计的100属属之间的​​分类关系是众所周知的，部分原因是形态特征以复杂的镶嵌方式出现在这些植物中。 为了获得一个独立的数据集来建立芳族之间的进化关系，罗格斯大学的詹姆斯·法国博士正在研究从该家族几乎所有已知属的代表性物种的叶片组织中分离出的叶绿体DNA突变。 叶绿体DNA是基因组数据的有用来源，因为其结构和功能总体上受到限制。密切相关的植物仅通过几个突变差异，而更古老的群体则显示出更多的突变差异。 通过测量Aroid属中叶绿体DNA的突变差异的数量和种类，French博士正在为家族建造系统发育树。 该分类关系的图将有助于改善这些植物的分类，将相关属组织到同一部落和亚家族中。 通过系统发育作为指导，研究人员可以研究aroids复杂形态和为家庭成员而闻名的各种繁殖系统的演变。