Systematics of Free-living Rhabditina (Nematoda)

自由生活的小杆纲（线虫）的系统学

• 批准号: 0922012
• 负责人: David Fitch
• 金额: $ 61万
• 依托单位: New York University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0922012&HistoricalAwards=false
• 关键词: Systematics; Free; living; Rhabditina; Nematoda

The project seeks to build a framework for evolutionary and systematic work in the rhabditid nematodes, a globally distributed group of free-living terrestrial roundworms. This project focuses on two species groups (clades), Eurhabditis and Pleiorhabditis. The primary objectives are to resolve evolutionary trees using multigene sequences; to elucidate the evolution of morphological characters in order to determine which features best diagnose different taxonomic groups; and to build an online database and key in order to make all this information freely and globally available.Their diversity, significant role in organic decomposition, usefulness as bioindicators, the associations they make with other species, and the sheer abundance of species and individuals make rhabditid nematodes an important taxon, yet it is one of the neediest for systematic work and data-sharing resources. This project provides a systematic framework for a growing number of comparative and evolutionary studies of rhabditid development, behavior, reproduction, and genome structure and function, because the group includes the model genetic organism Caenorhabditis elegans and "satellite" models such as Pristionchus pacificus, Oscheius tipulae, and others. In the process of this project, graduate and undergraduate students and a postdoctoral researcher will be trained in rhabditid systematics, preventing the extinction of expertise in this field.

该项目旨在为棒状线虫（一种分布于全球的自由生活的陆生蛔虫）的进化和系统工作建立一个框架。该项目重点关注两个物种组（进化枝）：Eurhabditis 和 Pleiorhabditis。主要目标是使用多基因序列解析进化树；阐明形态特征的演变，以确定哪些特征最能诊断不同的分类群；并建立一个在线数据库和密钥，以便在全球范围内免费提供所有这些信息。它们的多样性、在有机分解中的重要作用、作为生物指示剂的有用性、它们与其他物种的关联以及物种和个体的绝对丰富性使杆状线虫成为一个重要的分类单元，但它也是最需要系统工作和数据共享资源的分类单元之一。该项目为越来越多的横纹肌发育、行为、繁殖以及基因组结构和功能的比较和进化研究提供了一个系统框架，因为该群体包括模型遗传生物秀丽隐杆线虫和“卫星”模型，如Pristionchus pacificus、Oscheius Tipulae等。在该项目过程中，研究生和本科生以及博士后研究员将接受横纹肌系统学培训，防止该领域专业知识的消失。