DISSERTATION RESEARCH: The Genetics of Adaptation to a Novel Stressful Environment in Mimulus

论文研究： 酸浆菌适应新压力环境的遗传学

• 批准号: 1210755
• 负责人: John Willis
• 金额: $ 1.44万
• 依托单位: Duke University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-08-01 至 2014-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1210755&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Genetics; Adaptation; Novel

Closely related populations or species often occupy ecologically disparate habitats. Adaptation to new habitats can eventually lead to speciation. Local adaptation to different environments has been repeatedly demonstrated in plants and animals; however, the traits and genes that underlie this adaptation are poorly understood. This study focuses on finding the traits and genes that allow two species of Monkeyflower, Mimulus laciniatus and the as yet unnamed Bald Rock Mimulus (BR), to survive in a unique habitat. Other closely related Mimulus species occur in streams and seeps, but M. laciniatus and BR have independently colonized a harsh granite outcrop environment. Another unique characteristic that both these species share is a lobed leaf shape. Because of the physiological properties of lobed leaves they are predicted to be adaptive in the dry, exposed granite outcrop environment. The PIs will use genome mapping, genetic manipulation, field experiments, and environmental manipulations to assess the adaptive significance of lobed leaves in the novel granite outcrop environment. Understanding how plants adapt to harsh environments is essential for agricultural improvement and conservation, especially in light of climate change. If lobed leaf shape is important for adaptation to a dry environment then it could be incorporated into agricultural breeding programs. This project will also provide many opportunities to mentor undergraduates and high school students, including women and under-represented minorities, through programs at Duke and the Durham public schools.

密切相关的人群或物种经常占据生态上不同的栖息地。适应新栖息地最终会导致物种形成。在动植物中反复证明了对不同环境的局部适应。但是，理解这种适应的特征和基因知之甚少。这项研究的重点是寻找允许两种猴子毛lacimulus laciniatus和尚未透露姓名的秃头岩石Mimulus（BR）的特征和基因，以在独特的栖息地中生存。 其他密切相关的哑光物种出现在溪流和渗水中，但是Laciniatus和Br M. br独立地殖民了一个严酷的花岗岩露头环境。 这两个物种共享的另一个独特特征是叶状的形状。由于叶叶的生理特性，它们被预测在干燥的，裸露的花岗岩露头环境中具有自适应性。 PI将使用基因组映射，遗传操纵，现场实验和环境操纵来评估新型花岗岩露头环境中裂片叶片的适应性意义。了解植物如何适应恶劣的环境对于农业的改善和保护至关重要，尤其是鉴于气候变化。如果叶片形状对于适应干燥环境很重要，则可以将其纳入农业育种计划中。该项目还将通过在杜克大学和达勒姆公立学校的计划中为指导本科生和高中生（包括妇女和代表性不足的少数民族）提供许多机会。