Rapid radiation and sporophyte evolution in the Funariaceae: inferences from phylogenomics and cross generational cuticle development studies

葫芦科植物的快速辐射和孢子体进化：系统基因组学和跨代角质层发育研究的推论

• 批准号: 1146295
• 负责人: Bernard Goffinet
• 金额: $ 53.16万
• 依托单位: University of Connecticut
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-07-01 至 2017-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1146295&HistoricalAwards=false
• 关键词: Rapid; radiation; sporophyte; evolution; Funariaceae

A major trend during the evolution of plants since the conquest of land some 500 million years ago is one of increasing complexity. However complex innovations are sometimes abandoned by species in favor of simpler and hence less costly traits. Extreme architectural simplification obscures the record of evolutionary history, making it difficult to identify traits that foster diversification and ecological success. The moss family Funariaceae underwent an explosive radiation about 20 million years ago, resulting in species spanning a broad range of morphological complexities. The evolutionary history of this family, inferred from extensive genomic data, will provide the framework to test the hypothesis that species with dramatically simplified morphologies can give rise to descendants with complex architectures.This study focuses on the evolution of traits that helped plants adapt to land, and that are fundamental to their current ability to adapt to changing environmental conditions. Mosses fulfill important ecological roles in many ecosystems today, and understanding how their reproductive traits evolved over short periods of geological time provides insights into their potential to respond to future rapid global change. The concept of species with simplified morphologies being evolutionary dead ends is widely accepted but rarely tested, and unambiguous exampled from the plant kingdom are currently lacking.

自从大约5亿年前人类征服陆地以来，植物进化的一个主要趋势就是越来越复杂。然而，物种有时会放弃复杂的创新，转而选择更简单、成本更低的特征。极端的建筑简化模糊了进化历史的记录，使得难以识别促进多样化和生态成功的特征。大约2000万年前，苔藓科经历了一次爆炸性的辐射，导致物种跨越了广泛的形态复杂性。从广泛的基因组数据中推断出的这个家族的进化史，将为检验一个假设提供框架，即形态极其简化的物种可以产生具有复杂结构的后代。这项研究的重点是帮助植物适应陆地的性状的进化，这些性状对它们目前适应不断变化的环境条件的能力至关重要。苔藓在当今许多生态系统中发挥着重要的生态作用，了解它们的生殖特征是如何在短时间的地质时间内进化的，有助于了解它们应对未来快速全球变化的潜力。具有简化形态的物种是进化死胡同的概念被广泛接受，但很少得到验证，并且目前缺乏来自植物界的明确例子。