DISSERTATION RESEARCH: Evolution of a Spicy Polymorphism

论文研究：辣味多态性的进化

• 批准号: 1011024
• 负责人: Joshua Tewksbury
• 金额: $ 1.43万
• 依托单位: University of Washington
• 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: 2010-06-01 至 2011-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1011024&HistoricalAwards=false
• 关键词: DISSERTATION; RESEARCH; Evolution; Spicy; Polymorphism

Phenotypic and genetic variation within a species set the foundation for evolution and adaptation. This project will study local adaptation in natural populations of a wild chili, Capsicum chacoense, which has a polymorphism in fruit pungency (heat) that varies geographically in association with moisture availability. Field experiments will be used to test the environmental and biotic causes of variation in pungency and to evaluate the costs/benefits of pungency, the extent of local adaptation in pungency, and the primary ecological drivers maintaining this polymorphism. This project examines the evolutionary processes that have shaped a stable polymorphism in wild chili peppers and explores the role of drought stress, an important agronomic factor, in limiting adaptation. Chilies are a major crop that plays important roles in human diet, and the chemicals that cause its pungency, the capsaicinoids, have medical and security applications. This project includes public outreach and education, as well as training of undergraduates and international collaborations.

物种内的表型和遗传变异为进化和适应奠定了基础。该项目将研究野生辣椒（Capsicum chacoense）自然种群的当地适应性，辣椒在水果辛辣（热量）方面具有多态性，其地理位置与水分供应有关。田间试验将用于测试辛辣变化的环境和生物原因，并评估辛辣的成本/效益，辛辣的当地适应程度，以及维持这种多态性的主要生态驱动因素。该项目研究了形成野生辣椒稳定多态性的进化过程，并探讨了干旱胁迫（一个重要的农艺因素）在限制适应中的作用。 辣椒是一种在人类饮食中起重要作用的主要作物，引起其辛辣的化学物质辣椒素具有医疗和安全应用。 该项目包括公共宣传和教育，以及本科生培训和国际合作。

项目成果

Why are not all chilies hot? A trade-off limits pungency

• DOI: 10.1098/rspb.2011.2091
• 发表时间: 2012-05
• 期刊: Proceedings of the Royal Society B: Biological Sciences
• 作者: D. Haak;L. A. McGinnis;D. Levey;J. Tewksbury