Evolution of a giant genus (II): A phylogenetic case study within Peperomia (Piperaceae)

在过去的两年里，在综合生成的数据和解决物种丰富的胡椒属的主要系统和分类学问题方面取得了重大进展。此外，还生成了序列数据，并对形态特征进行了评分，以跟踪特征进化。前两年的各项预定任务已全部完成。虽然我们已经发表了几篇论文，记录了所取得的进展，但还需要两年时间才能完成现有的数据集、分析和解释数据以及发表主要论文。具体来说，我们将集中在：i)上次实地考察的序列材料，它集中在主要附生属的更多祖先(陆地)物种上，ii)用这些收集的材料和从合作伙伴那里获得的材料扩大骨干系统发育，iii)评估产生的数据的系统发生学意义，特别是关于分子进化(例如，速率异质性)以及系统和分类学意义，iv)添加生物地理方法，通过对地球植物物种的几乎完整的采样以及整个属的具有代表性的全球采样，以及最后但并非最不重要的v)我们将进行祖先区域重建和分子测年分析，尽可能完整地描述这一群体的演变。

In the last two years, major progress has been made towards a synthesis of generated data and solution of major systematic and taxonomic issues in the species-rich genus Peperomia. Furthermore, sequence data have been generated and morphological traits have been scored to trace character evolution. All scheduled tasks of the first two years have been accomplished. Although we already published several papers documenting the progress made, two additional years are needed to complete the existing datasets, to analyze and interpret the data as well as to publish the main papers. In detail we will focus on: i) sequence material from the last field trip which focused on the more ancestral (terrestrial) species of the mainly epiphytic genus, ii) enlarging the backbone phylogeny with accessions from these collections and material obtained from cooperation partners, iii) evaluate the phylogenetic implication of the generated data, especially with respect to molecular evolution (e.g. rate heterogeneity) as well as systematic and taxonomic implications, iv) adding a biogeographical approach, enabled by an almost complete sampling of the geophytic species as well as a representative worldwide sampling for the whole genus, and last but not least v) we will perform ancestral area reconstructions and molecular dating analyses, providing a picture as complete as possible of the evolution of this group.