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

在过去的5亿年中，陆地植物的演化史的特点是在主要的气候变化、特定的地质事件或特定特征的演变之后周期性地爆发多样性。物种形成如此之快，以至于后代之间的关系很难识别，需要大量的数据来解析家谱。苔藓谱系Hypnanae在其起源165mya之后经历了一次爆炸性辐射。今天，它由大约5000个物种组成，但它们被归类为进化单位的情况并不清楚。利用基因丰富策略结合基因表达数据从大量的基因样本中进行推断，将为我们提供一个强大的框架，以促进我们对这种多样化和生态重要性的联系的理解。这项研究的重点是解开因爆炸性多样化而产生的物种之间的关系，识别引发这些事件的地质或气候变化，并理解形态创新的重要性，使其能够适应不同的生境。苔藓的目标群体比针叶树更多样化，在一些群落中占据主导地位，并在世界各地发挥着关键的生态作用。解决多样性谱系崛起背后的模式和过程提供了一个机会，可以理解这些有机体可能如何应对快速的全球变化。

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.