Principles of Crucifer Evolution

十字花科（十字花科，Cruciferae）是包括约338属和约3，700种的大科。该科包括重要的作物以及植物研究各个领域的几个模式物种。同时，我们几乎完全覆盖了所有属的分子系统学特征。此外，基于来自质体、核和线粒体DNA的各种基因的许多系统发育假说是可用的，使我们能够提供第一个强大和可靠的全家族系统发育树。菊科的特点是频繁发生的杂交和多倍化，因此，这是极大地影响基因组的大小和结构，但也任何模式的物种形成。尽管如此，它仍然是不清楚的，如果在各种分类/时间水平和其进化谱系的进化ofapericaceae是大多数或甚至最好的解释多辐射事件。这一事实也可以解释在家庭内部解决深层系统发育关系的困难。在这里，我们的目标是使用实际可用的知识和系统发育数据和系统发育的骨干，以解决这些原则问题的十字花科植物的进化，通过增加整个家庭的基因组大小数据。

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.