LiT: Genomic Analysis of Life-History Adaptation to Variation in Seasonal Water Availability in Mimulus

LiT：酸浆草生活史适应季节性水供应变化的基因组分析

• 批准号: 1024966
• 负责人: John Willis
• 金额: $ 58.5万
• 依托单位: Duke University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-01 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1024966&HistoricalAwards=false
• 关键词: LiT; Genomic; Analysis; Life; History

John H.Willis IOS - 1024966LiT: Genomic analysis of life-history adaptation to variation in seasonal water availability in MimulusGlobal warming trends indicate that many geographic regions are experiencing shorter, milder winters and longer, hotter summers. Due to the accelerated onset of summer drought in western North America, local plant species reliant on snowmelt and ephemeral water supplies will experience strong selection to grow and reproduce earlier. The evolutionary response of plant species to continued changes in seasonal soil moisture availability will likely involve earlier flowering and flowering under shorter day lengths in order to escape periods of prolonged drought. Tremendous genetic variation in day length sensitivity and flowering time was recently discovered in the ecological genomic model system Mimulus guttatus and its closely related wildflower species. This adaptive variation is associated with local environmental differences in the onset of drought, and it likely represents the kinds of genetic changes that could occur in response to continued climate change. This project uses powerful genome mapping approaches and experiments in natural habitats to identify key genes involved in variation in seasonal timing of flowering and drought escape. The investigators will engage high school and undergraduate students from underrepresented groups in workshops and research projects. Additionally, valuable collections of seed stocks and genome data will be made available to the entire scientific community. The seed collections will be available for evolutionary studies for up to fifty years from now. This will allow them to be compared to future samples from the same populations and to identify genes involved in future climate change adaptations.

John H.Willis iOS -1024966LIT：对Mimulusglobal变暖趋势中季节性水利用率变化的生命历史适应的基因组分析表明，许多地理区域正在经历更短的，温和的冬季冬季和更长的夏季。 由于北美西部夏季干旱的加速发作，依靠融雪和短暂供水的当地植物物种将经历强烈的选择，可以早期生长和繁殖。植物物种对季节性土壤水分供应持续变化的进化反应可能会涉及较短的一天长度下的开花和开花，以避免长期干旱的时期。最近在生态基因组模型系统Mimulus Guttatus及其密切相关的野花物种中发现了白天长度灵敏度和开花时间的巨大遗传变异。这种适应性变化与干旱发作的局部环境差异有关，它可能代表了响应持续气候变化而发生的遗传变化的种类。该项目使用自然栖息地中强大的基因组映射方法和实验来识别与开花和干旱逃生季节性时机变化有关的关键基因。调查人员将在研讨会和研究项目中吸引来自代表性不足的团体的高中和本科生。此外，将向整个科学界提供宝贵的种子库存和基因组数据收集。从现在起，种子收集将用于进化研究长达五十年。这将使它们与来自同一人群的未来样本进行比较，并确定未来气候变化适应的基因。