North America Research Fellows Program: The Ecology and Evolution of Host Use

北美研究员计划：宿主使用的生态学和演变

• 批准号: 9505941
• 负责人: Judith Becerra
• 金额: $ 6.54万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-06-15 至 1999-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9505941&HistoricalAwards=false
• 关键词: North; America; Research; Fellows; Program

9505941 Becerra This award is under the North American Research Fellows Program, which enables U.S. scientists and engineers from the United States, Canada and Mexico, to visit research establishments in one or both of the other two countries for periods of three to twelve months. The program's awards provide opportunities for joint research, and the use of unique or complementary facilities, expertise and experimental conditions abroad. This award will support a twelve month postdoctoral research visit by Dr. Judith X. Becerra to work with Dr. Daniel Pinero at Ciudad Universitaria (UNAM) in Mexico. A second year of support will be provided by the Postdoctoral and Junior Investigator Research Fellows Program, to work with Dr. Michael Hammer at the University of Arizona. This research will involve comparison of DNA phylogeny of the chrysomelid genus Blepharida with the evolution of chemical and morphological traits of its host, the genus Bursera. The PI will also determine whether adaptive traits in plants and insects have evolved under each other's evolution by testing whether the ages of the associated clades of plants and insects are equivalent. The U.S. portion of the award will be spent estimating the probable dates of origin of species of Bursera and Blepharida by calculating the rates of nucleotide substitution in the ITS (Internal Transcribed Spacer) sequences obtained, following the molecular clock hypothesis. This research will provide the first evaluation of the significance of plant defensive chemical compounds, defensive plant morphology, and counterdefensive insect morphology and behavior, for the evolution of host exploitation by phytophagous insects. ***

小行星9505941 该奖项是根据北美研究员计划，该计划使来自美国，加拿大和墨西哥的美国科学家和工程师能够访问另外两个国家中的一个或两个国家的研究机构，为期三至十二个月。该计划的奖项提供了联合研究的机会，以及使用国外独特或互补的设施，专业知识和实验条件。 该奖项将支持Judith X博士为期12个月的博士后研究访问。贝塞拉与丹尼尔皮内罗博士在墨西哥城大学（UNAM）工作。 第二年的支持将由博士后和初级研究员研究员计划提供，与亚利桑那大学的Michael Hammer博士合作。 本研究将比较金蝇属Blepharida的DNA遗传与其寄主Bursera属的化学和形态特征的进化。 PI还将通过测试植物和昆虫的相关分支的年龄是否相等来确定植物和昆虫的适应性特征是否在彼此的进化下进化。 该奖项的美国部分将用于根据分子钟假设，通过计算获得的ITS（内部转录间隔区）序列中的核苷酸替换率来估计Bursera和Blepharida物种的可能起源日期。 本研究将首次评价植物防御性化合物、防御性植物形态和反防御性昆虫形态与行为对植食性昆虫利用寄主进化的意义。 ***