Dissertation Research: Phylogenetics and Resource Specialization in the Seed Beetle Genus Stator (Coleoptera: Chrysomelidae: Bruchinae)

论文研究：种子甲虫属定子（鞘翅目：叶甲科：Bruchinae）的系统发育和资源专业化

• 批准号: 0073330
• 负责人: Brian Farrell
• 金额: $ 0.9万
• 依托单位: Harvard University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-05-15 至 2002-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0073330&HistoricalAwards=false
• 关键词: Dissertation; Research; Phylogenetics; Resource; Specialization

0073330Farrell and Morse Most herbivorous insects feed on only one or very few kinds of hostplants, despite the apparent advantages of being able to use multiple hosts when foodplants are scarce in space or time. Ecological research has generatedconsiderable insight into the generation and maintenance of this specialization, but the long term persistence and consequences of variation in diet breadth are poorly understood. For example, is specialization a dead end? There is less evidence on how or even whether the process of specialization within populations of generalist species is connected to speciation and specialist species. Research by graduate student Geoffrey Morse, under the direction of Dr. Brian Farrell, will use DNA sequence data to: (1) reconstruct the phylogenyof the seed beetle genus Stator (family Bruchidae); and (2) examine the genetic relationships of populations of the sister species S. limbatus Horn (a generalist seed predator) and S. beali Johnson (a specialist feeder). The first aspect will test hypotheses concerning the evolutionary consequences of changes in resource specialization. The second aspect will test hypotheses concerning both the nature of speciation in phytophagous insects, and the population geneticcorrelates of divergence in diet breadth. Insights into how insects become specialists or generalists, as well as into the evolutionary consequences of these different habits, have implications for fields as diverse as evolutionary biology, conservation biology, and agricultural entomology. By providing an explicit historical perspective on the evolutionary ecology of host use in Stator, this research will contribute to the synthesis between ecological and evolutionary explanations of diversity and resource use.

0073330 Farrell和莫尔斯大多数食草性昆虫只以一种或很少几种寄主植物为食，尽管当食用植物在空间或时间上稀缺时，能够利用多种寄主具有明显的优势。 生态学研究已经产生了相当多的洞察力的生成和维护这种专业化，但长期的持久性和饮食宽度的变化的后果知之甚少。 例如，专业化是一条死胡同吗？ 关于通才物种种群内的专门化过程如何甚至是否与物种形成和专门物种有关的证据较少。研究生杰弗里莫尔斯在布赖恩法雷尔博士的指导下进行的研究将使用DNA序列数据：（1）重建种子甲虫属Stator（豆象科）的遗传;（2）检查姐妹物种S种群的遗传关系。limbatus Horn（多面手种子捕食者）和S. beali约翰逊（一个专门饲养员）。 第一个方面将检验关于资源专业化变化的进化后果的假设。 第二个方面将测试有关植食性昆虫物种形成的性质和饮食宽度差异的群体遗传相关性的假设。深入了解昆虫如何成为专家或多面手，以及这些不同习惯的进化后果，对进化生物学，保护生物学和农业昆虫学等不同领域都有影响。 通过提供一个明确的历史视角的进化生态学的主机使用定子，本研究将有助于多样性和资源利用的生态和进化解释之间的合成。