Exploring the genetic basis of adaptation within a conservation context

探索保护环境下适应的遗传基础

• 批准号: 341711-2007
• 负责人: Russello, Michael
• 金额: $ 1.4万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2009
• 资助国家: 加拿大
• 起止时间: 2009-01-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=429817
• 关键词: Exploring; genetic; basis; adaptation; within

Conservation biologists have long appreciated the importance of preserving the ability of organisms to adapt to changing environments. Although generally viewed as a hallmark goal of conservation biology, little research has been conducted towards identifying adaptive genetic variation that contributes to a species evolutionary potential and ability to survive future environmental changes. Until recently, our capacity to directly quantify adaptive genetic variation has been limited to a handful of model organisms studied under artificial conditions. The recent emergence of population genomics, which combines genomic technologies with population genetics theory, provides a framework for detecting genome-wide associations between segregating variation and fitness-related traits in natural populations. My program will entail one of the first applications of population genomics for studying adaptive population divergence within a conservation context. At a local scale, neutral and adaptive genetic variation will be used to designate conservation units between two sympatric ecotypes of the threatened Okanagan lake kokanee and to elucidate the genetic basis underlying their distinct reproductive behaviors. Benefits of this research include identifying molecular markers linked to fitness-related traits for guiding stock assessment, long-term ecological monitoring, and evaluating management practices. At the landscape level, genomic scans will be conducted to better understand the genetic basis of adaptation along an environmental gradient in a climate change sensitive species, the Common pika of British Columbia. As a high latitude country, current models predict Canada may experience higher than average warming, with significant implications for the distribution of native flora and fauna. My research has the potential to be among the first to investigate patterns of variation at genomic regions influencing a species ability to respond to climate change. In addition to the basic and applied insights gained from this overall body of work, my program has the benefits of bringing together a collaboration of academic and governmental scientists while providing extensive opportunities for undergraduate and graduate student training.

保护生物学家长期以来一直意识到保护生物体适应变化环境的能力的重要性。 虽然通常被视为保护生物学的标志性目标，但很少有研究对识别适应性遗传变异做出贡献，这些遗传变异有助于物种的进化潜力和在未来环境变化中生存的能力。 直到最近，我们直接量化适应性遗传变异的能力一直局限于人工条件下研究的少数模式生物。最近出现的群体基因组学，它结合了基因组学技术和群体遗传学理论，提供了一个框架，用于检测自然群体中分离变异和适合度相关性状之间的全基因组关联。 我的计划将需要人口基因组学的第一个应用程序之一，研究在保护环境中的适应性人口分化。 在局部范围内，中性和适应性的遗传变异将被用来指定两个同域生态型的受威胁的Okanagan湖kokanee之间的保护单位，并阐明其独特的生殖行为的遗传基础。 这项研究的好处包括识别与适合度相关性状相关的分子标记，用于指导种群评估，长期生态监测和评估管理实践。 在景观一级，将进行基因组扫描，以更好地了解气候变化敏感物种-不列颠哥伦比亚省普通鼠兔-沿着环境梯度适应的遗传基础。作为一个高纬度国家，目前的模型预测加拿大可能会经历高于平均水平的变暖，对本土植物群和动物群的分布产生重大影响。 我的研究有可能成为第一个研究影响物种应对气候变化能力的基因组区域变异模式的人。 除了从这一整体工作中获得的基本和应用见解外，我的计划还具有汇集学术和政府科学家合作的优势，同时为本科生和研究生培训提供广泛的机会。