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

在过去的5亿年里，陆地植物的进化史的特点是随着主要的气候变化、特定的地质事件或特定特征的进化而周期性的多样化爆发。物种形成如此之快，以至于后代之间的关系很难确定，而且需要大量的数据来确定家谱。苔藓谱系Hypnanae在其起源后经历了一次爆炸性的辐射。今天，它包括大约5000个物种，但它们在进化单位中的分组是模糊的。利用基因富集策略结合基因表达数据，从大量的基因样本中得出推论，将为我们进一步了解这种多样性和生态上重要的谱系提供一个强大的框架。这项研究的重点是解开由爆炸性多样化产生的物种之间的关系，确定触发这些事件的地质或气候变化，以及理解允许适应不同栖息地的形态创新的意义。苔藓的目标群比针叶树更多样化，在一些群落中占主导地位，在世界范围内起着至关重要的生态作用。解决多样性谱系兴起背后的模式和过程，为了解这些生物如何应对快速的全球变化提供了机会。

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.