Collaborative Research: AToL: Assembling the Pleurocarp Tree of Life: Resolving the rapid radiation using genomics and transcriptomics

合作研究：AToL：组装侧果生命树：利用基因组学和转录组学解决快速辐射问题

• 批准号: 1239992
• 负责人: Norman Wickett
• 金额: $ 42.83万
• 依托单位: Chicago Horticultural Society
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1239992&HistoricalAwards=false
• 关键词: Collaborative; Research; AToL; Assembling; Pleurocarp

The evolutionary history of land plants over the last 500 million years is characterized by periodic bursts of diversification following major climatic shifts, specific geologic events, or the evolution of specific characters. Speciation is then so rapid that the relationships among descendants are hard to identify, and large sets of data are needed to resolve the family tree. The moss lineage Hypnanae underwent an explosive radiation following its origin 165 mya. Today, it comprises about 5,000 species, but their grouping into evolutionary units is obscure. Inferences from extensive sets of genes sampled using a gene enrichment strategy combined with gene expression data will provide a robust framework to further our understanding of this diverse, and ecologically important lineage.This study focuses on untangling the relationships among species that arose from an explosive diversification, on identifying the geologic or climatic shifts that triggered these events, and on understanding the significance of morphological innovations allowing adaptations to diverse habitats. The target group of mosses is more diverse than conifers, dominates some communities, and plays critical ecological roles throughout the world. Resolving the patterns and processes underlying the rise of a diverse lineage offers an opportunity to understand how these organisms may respond to rapid global change.

过去5亿年陆地植物的进化史的特点是，随着重大气候变化、特定地质事件或特定性状的进化，周期性爆发多样化。物种形成是如此之快，以至于后代之间的关系很难识别，并且需要大量数据来解析家谱。苔藓谱系 Hypnanae 在其起源 165 mya 后经历了一次爆炸性辐射。如今，它包含约 5,000 个物种，但它们的进化单位分类尚不清楚。使用基因富集策略结合基因表达数据对大量基因进行采样的推论将为我们进一步了解这种多样化且具有生态重要性的谱系提供一个强大的框架。这项研究的重点是理清因爆炸性多样化而产生的物种之间的关系，确定引发这些事件的地质或气候变化，并了解形态创新允许适应不同栖息地的重要性。苔藓的目标群体比针叶树更加多样化，在一些群落中占主导地位，并在全世界发挥着重要的生态作用。解决多样化谱系崛起背后的模式和过程，为了解这些生物体如何应对快速的全球变化提供了机会。