Genetic and environmental contributions to diversity in salmon maturation and migratory life histories

遗传和环境对鲑鱼成熟和迁徙生活史多样性的贡献

• 批准号: 183655-2009
• 负责人: Heath, Daniel
• 金额: $ 4.52万
• 依托单位: University of Windsor
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2011
• 资助国家: 加拿大
• 起止时间: 2011-01-01 至 2012-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=476390
• 关键词: Genetic; environmental; contributions; diversity; salmon

Salmon are often thought to be locally adapted due to their natal homing and remarkable life history variation; yet little empirical evidence exists to support this. Additive genetic variance is an important component of adaptation, yet environment, epigenetics, non-additive genetics, and phenotypic plasticity also have roles in rapid evolution and local adaptation. I propose to use molecular, population, and quantitative genetic methods combined with field measurements to quantify the various genetic, epigenetic and environmental effects on maturation and migration life history traits in Pacific salmon. Pacific salmon are ideal model organisms for my research as they exhibit extreme life history variation and experience strong selection (since they die after spawning); my proposed research will capitalize on my experience in salmon genetics, ecology and physiology to assess rapid evolution and local adaptation in Pacific salmon.

鲑鱼通常被认为是当地适应的，因为它们的出生归巢和显著的生活史变化；然而，几乎没有经验证据支持这一观点。加性遗传变异是适应的重要组成部分，但环境、表观遗传、非加性遗传和表型可塑性也在快速进化和局部适应中发挥作用。我建议使用分子、种群和定量遗传学方法结合实地测量来量化太平洋鲑鱼成熟和迁徙生活史性状的各种遗传、表观遗传和环境影响。太平洋鲑鱼是我研究的理想模式生物，因为它们表现出极端的生活史变异和强烈的选择（因为它们在产卵后死亡）；我提出的研究将利用我在鲑鱼遗传学、生态学和生理学方面的经验来评估太平洋鲑鱼的快速进化和当地适应。