PRF/J: Mitochondrial DNA Sequence Variation and the Genetic Structure of Canvasback and Redhead Duck Populations: Direct Sequencing of the Control Region to Improve the Resolution

PRF/J：帆布背鸭和红头鸭种群的线粒体 DNA 序列变异和遗传结构：控制区域的直接测序以提高分辨率

• 批准号: 9303298
• 负责人: Michael Sorenson
• 金额: --
• 依托单位: Individual Award
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-08-01 至 1997-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9303298&HistoricalAwards=false
• 关键词: PRF; Mitochondrial; DNA; Sequence; Variation

The primary objective of this research is to test predictions about the genetic structure of canvasback duck (Aythya valisineria) and redhead duck (A. americana) populations using sequence variation data from the mitochondrial DNA (mtDNA) control region. Philopatry to natal areas is strongly female-biased in migratory waterfowl, whereas males disperse widely prior to the time they breed; this characteristic is unlike that of most other birds. The uniqueness of such a social system suggests that despite a massive flow of nuclear genes mediated by male dispersal, mtDNA variation may be geographically structured. In other words, mitochondrial DNA lineages in local or regional populations may differentiate because they are isolated from other maternal lineages due to female site-fidelity. This work will test whether effects of gender-based philopatry on mtDNA gene flow are reflected in geographic patterns of mtDNA sequence variation. Geographic structure in mtDNA variation is to be evaluated using nucleotide sequence data from the rapidly evolving control region. This technique should permit much finer resolution of genetic differentiation than restriction fragment analysis, the technique used in nearly all previous avian mtDNA investigations. %%% Acquiring fine-grained knowledge about the genetic structure of long-distance migrants will facilitate the prudent management of an economically-important component of native North American biodiversity. In addition insights gained in this research will advance historical phylogeography (geography from a phylogenetic perspective), a growing point in ecology and systematics.

这项研究的主要目的是测试预测 帆布鸭遗传结构的研究 和红头鸭（A.美洲）人口使用序列 来自线粒体DNA（mtDNA）控制区的变异数据。 对纳塔尔地的崇拜在移徙者中强烈偏向女性， 水禽，而男性分散广泛之前，他们的时间， 繁殖;这一特点是不同于大多数其他鸟类。 的 这种社会制度的独特性表明，尽管有大量的 雄性扩散介导的核基因流动，mtDNA变异 可能是地理结构的。 换句话说，线粒体 地方或区域人群中的DNA谱系可能会分化 因为他们与其他母系血统隔离， 女性网站忠诚度。 这项工作将测试是否影响 基于性别的对mtDNA基因流动的哲学反映在 mtDNA序列变异的地理模式。 地理 线粒体DNA变异中结构将使用核苷酸 来自快速进化的控制区的序列数据。 这 技术应该允许更精细遗传分辨率 与限制性片段分析相比， 在几乎所有以前的鸟类mtDNA研究中使用。 %%% 获得关于遗传结构的精细知识 长途移民将有助于谨慎管理 北美原住民经济上重要的组成部分 生物多样性 此外，在这项研究中获得的见解将 推进历史地理学（地理学从一个系统发育 观点），生态学和系统学的生长点。