Evolutionary History of Defense Genes in the Genus Zea and Family Poaceae: Insight from DNA Sequence Data

玉米属和禾本科防御基因的进化史：来自 DNA 序列数据的见解

• 批准号: 0235027
• 负责人: Peter Tiffin
• 金额: $ 35.6万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-02-01 至 2007-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0235027&HistoricalAwards=false
• 关键词: Evolutionary; History; Defense; Genes; Genus

The mechanisms by which plants defend themselves against herbivores and pathogens have been subject to extensive investigation in contemporary populations. In comparison, relatively little is known about the long-term evolutionary dynamics of plant defenses. This research will use the information contained in DNA sequences to investigate these long-term dynamics. DNA sequence diversity of defense genes in three Zea species, including the domesticate Z. mays ssp. mays (corn), and divergence of defense genes among different genera of grasses will be analyzed. These analyses will provide an unprecedented picture of the evolutionary history and present day diversity of plant defense genes.In addition to advancing our understanding of plant evolution, the results from this research may be very valuable to agriculture. For example, the extensive sampling of defense alleles may identify genetic resources useful for developing sustainable means of pest control. This research may identify plant defenses that are evolutionarily stable and, thus, may provide durable resistance against parasites. Analysis of inter- and intra-population diversity will provide data necessary for developing efficient strategies for collecting genetic resources for conservation and crop improvement. Graduate and undergraduate students will participate in the proposed research and will have opportunities to learn molecular techniques and molecular-evolutionary analyses.

植物抵御食草动物和病原体的机制在当代种群中受到了广泛的研究。相比之下，人们对植物防御的长期进化动态知之甚少。这项研究将利用DNA序列中包含的信息来研究这些长期动态。包括驯化玉米在内的三种玉米防御基因的DNA序列多样性。玉米)，以及不同属牧草之间的防御基因差异。这些分析将提供一幅前所未有的关于植物防御基因进化历史和现代多样性的图景。除了加深我们对植物进化的理解外，这项研究的结果可能对农业非常有价值。例如，对防御等位基因的广泛采样可能会确定对开发可持续的害虫控制手段有用的遗传资源。这项研究可能会识别进化上稳定的植物防御系统，从而可能对寄生虫提供持久的抗性。对种群间和种群内多样性的分析将为制定有效战略收集遗传资源以进行保护和作物改良提供必要的数据。研究生和本科生将参与这项拟议的研究，并将有机会学习分子技术和分子进化分析。