Principles of Crucifer Evolution

十字花科（芸苔科，十字花科）是一个大科，包括约338属和约3700种。该科包括重要的作物以及植物研究各个领域的几种模式种。同时，我们几乎完全覆盖了所有属的分子系统表征。此外，基于质体，核和线粒体DNA的各种基因的许多系统发育假设使我们能够提供第一个强大而可靠的全家族系统发育树。十字花科植物以频繁发生的杂交和多倍体化为特征，这极大地影响了基因组的大小和结构，也影响了任何物种形成模式。然而，目前尚不清楚的是，在不同的分类/时间水平上，芸苔科及其进化谱系的进化是否主要或最好地解释了多重辐射事件。这一事实也可以解释解决家庭内部深层系统发育关系的困难。在此，我们的目标是利用实际可用的知识和系统发育数据以及系统发育主干，通过添加整个家族的基因组大小数据来解决十字花科植物进化的这些原则问题。

Crucifers {Brassicaceae, Cruciferae) are a large family comprising some 338 genera and approximately 3,700 species. The family includes important crops as well as several model species in various fields of plant research. Meanwhile, we have nearly complete coverage of a molecular-systematic characterization of all genera. And, in addition numerous phylogenetic hypothesis based on various genes from the plastome, nuclear and mitochondrial DNA are available enabling us to provide first robust and reliable family-wide phylogenetic trees. The Brassicaceae are characterized by frequently occurring hybridization and polyploidization, which, as a consequence, is greatly affecting genome size and structure, but also any mode of speciation. Nonetheless, it is still unclear if the evolution ofthe Brassicaceae on the various taxonomic/temporal levels and of its evolutionary lineages is mostly or even best explained by multiple radiation events. A fact that can also account for the difficulties to resolve deep phylogenetic relationships within the family. Herein we are aiming to use the actually available knowledge and phylogenetic data and a phylogenetic backbone to address these principles questions of crucifer evolution by adding genome size data across the whole family.