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，陆地植物的进化历史的特点是随着重大气候变化、特定地质事件或特定特征的进化而周期性地爆发多样化。物种形成如此之快，以至于后代之间的关系很难确定，需要大量的数据来解析家谱。苔藓谱系Hypnanae经历了爆炸性的辐射后，其起源165百万年。今天，它包括大约5,000个物种，但它们在进化单位中的分组是模糊的。从基因富集策略结合基因表达数据采样的大量基因中得出的推论将为我们进一步理解这一多样性和生态重要性谱系提供一个强大的框架。这项研究的重点是解开物种之间的关系，这些关系源于爆炸性的多样化，确定触发这些事件的地质或气候变化，以及理解形态学创新的重要性，从而适应不同的栖息地。苔藓的目标群体比针叶树更多样化，在一些群落中占主导地位，并在世界各地发挥着关键的生态作用。解决多样化谱系兴起的模式和过程提供了一个了解这些生物如何应对快速全球变化的机会。

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.