Context-Dependent Mode of Selfing and Inbreeding Depression: Consequences for the Evolution of Dioecy

自交和近交衰退的环境依赖性模式：雌雄异体进化的后果

• 批准号: 0449488
• 负责人: Tia-Lynn Ashman
• 金额: --
• 依托单位: University of Pittsburgh
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-02-15 至 2011-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0449488&HistoricalAwards=false
• 关键词: Context; Dependent; Mode; Selfing; Inbreeding

This project explores the role of resource environment in determining plant mating system (i.e., the degree that plants self versus outcross pollinate) and pollen export by altering flowering traits, vegetative growth and interactions with insect pollinators. These factors, in turn, are instrumental in shaping the optimal plant breeding system for a given environment. This work will use replicated populations of plants and genetic markers to estimate the effects of resources on pollinator behavior, pollen movement and mating system. This work will significantly advance our understanding of why plants with separate genders are favored over those with combined genders in dry, resource poor environments.This work will inform broadly on how environmental change can impact plant breeding systems via plant growth and pollinator interactions. Thus, this work will contribute to our understanding of how climate change and global pollinator declines may impact plant reproduction. It will promote student training in molecular techniques and field experimental design. By participating in the research endeavor these students will act as informal ambassadors for the field of science regardless of their final professional goals. Results of this work will contribute to society by expanding our knowledge of the mating patterns and consequently the genetic diversity of an important wild relative of the cultivated strawberry.

本项目探讨了资源环境在决定植物交配系统中的作用（即，植物自花授粉与异花授粉的程度）以及通过改变开花性状、营养生长和与昆虫传粉者的相互作用而输出花粉。这些因素反过来又有助于为给定的环境塑造最佳的植物育种系统。这项工作将利用植物的复制种群和遗传标记来估计资源对传粉者行为、花粉运动和交配系统的影响。这项工作将大大推进我们对为什么在干旱、资源贫乏的环境中，不同性别的植物比混合性别的植物更受青睐的理解。这项工作将广泛地了解环境变化如何通过植物生长和传粉者相互作用影响植物育种系统。因此，这项工作将有助于我们了解气候变化和全球传粉媒介的减少如何影响植物繁殖。它将促进学生在分子技术和现场实验设计方面的培训。通过参与研究奋进，这些学生将作为科学领域的非正式大使，无论他们的最终职业目标如何。这项工作的结果将有助于社会扩大我们的知识的交配模式，从而遗传多样性的一个重要的野生近栽培草莓。