REU: Natural Selection, Breeding Structure and Hybridizationin Louisiana Irises

REU：路易斯安那鸢尾的自然选择、育种结构和杂交

• 批准号: 9004242
• 负责人: Michael Arnold
• 金额: $ 2.5万
• 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: 1990
• 资助国家: 美国
• 起止时间: 1990-09-01 至 1992-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9004242&HistoricalAwards=false
• 关键词: REU; Natural; Selection; Breeding; Structure

In this study, Dr. Michael Arnold and his colleagues will analyze natural hybridization between the Louisiana iris species, I.fulva and I.hexagona. The genetic interaction between these two species has been used as the classic example of the process of interspecific gene flow. In order to study the pattern of transfer of genetic material between these two species, the investigators have established an experimental hybrid population in southern Louisiana. Individuals of I. hexagona were introduced into a natural population of I. Fulva and were allowed to flower during the spring of 1990. Leaf material and seeds have been collected from each of the flowering individuals of both species. Genetic markers that are diagnostic for either I. fulva or I. hexagona will be examined using material isolated form the leaf and seed samples. This will allow a test to determine whether or not hybrids have been formed and whether hybridization occurs bi-directionally (ie., with I. fulva and I. hexagona acting both maternal and paternal parents). These data will allow an estimate of the effects of natural selection on hybridization between these two species by comparing the proportion of interspecific versus intraspecific offspring that are produced.

在这项研究中，迈克尔·阿诺德博士和他的同事将 分析路易斯安那州鸢尾属物种之间的自然杂交， I.fulva和I. hexagona。 这些基因之间的相互作用 两个物种被用作该过程的经典例子 种间基因流的影响 为了研究 这两个物种之间的遗传物质转移， 研究人员建立了一个实验性的杂交种群 在路易斯安那州南部 个人I。六边形 引入自然种群I.富尔瓦和被允许 在1990年春天开花。 叶片材料和种子 已经从每一个开花的个体中收集到了 两个物种。 遗传标记可以诊断I. fulva或I.将使用分离的材料检查六边形 形成叶子和种子样品。 这将允许测试 确定是否已经形成杂交，以及是否 杂交发生双向（即，跟内部调查fulva和I. 六角形既充当母本又充当父本）。 这些数据 将允许估计自然选择对 这两个物种之间的杂交通过比较 种间后代与种内后代的比例， 是生产出来的。