DISSERTATION RESEARCH: Evolutionary Genetics of Novel Herbicide Tolerance in the Common Morning Glory

论文研究：普通牵牛花新型除草剂耐受性的进化遗传学

• 批准号: 0308869
• 负责人: Rodney Mauricio
• 金额: $ 0.81万
• 依托单位: University of Georgia Research Foundation Inc
• 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: 2003-07-15 至 2006-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0308869&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Evolutionary; Genetics; Novel

The introduction of chemical means of eradicating pest species intensified agricultural production, but at the cost of rapid evolution of resistant organisms. Our observation of the evolution of novel tolerance to the herbicide RoundUp. In the common morning glory, Ipomoea purpurea, provides an excellent example of human-mediated evolution. We have evidence from a preliminary greenhouse study that there is genetic variation among maternal lines of Ipomoea purpurea for tolerance to RoundUp. We will further investigate the evolution of this trait by studying the genetic control of herbicide tolerance and the potential constraints on its evolution. The experiments will examine how tolerance is inherited by performing greenhouse crosses and subsequent progeny analyses. The potential for constraints on the evolution of tolerance will be investigated by comparing relative fitness of herbicide tolerant and susceptible individuals in the absence of herbicide in the field. The broader impacts of this study are manifest to U.S. agriculture. Since use of RoundUp is increasing markedly, it is critical that evolutionary analyses of its use be completed. An understanding of the genetic basis and fitness costs of tolerance to this herbicide will be of broad importance.

采用化学方法消灭害虫加强了农业生产，但代价是抗药性有机体的迅速进化。我们对除草剂RoundUp的新耐受性进化的观察。在常见的牵牛花中，Ipomoea purpurea提供了人类介导进化的一个很好的例子。我们有证据表明，从初步温室研究，有遗传变异的母本线的Ipomoea purpurea耐农达。我们将通过研究除草剂耐受性的遗传控制及其进化的潜在制约因素来进一步研究这一性状的进化。这些实验将通过进行温室杂交和随后的后代分析来研究耐受性是如何遗传的。将通过比较田间不存在除草剂时除草剂耐受和敏感个体的相对适合度来研究对耐受性进化的限制潜力。这项研究对美国农业的更广泛影响是显而易见的。由于RoundUp的使用显著增加，因此必须完成对其使用的演变分析。对这种除草剂耐受性的遗传基础和适应性成本的理解将具有广泛的重要性。