Walden Nora, Nguyen Thu-Phuong, Mandáková Terezie, Lysak Martin A, Schranz Michael Eric
Biosystematics Group, Wageningen University, Wageningen, Netherlands.
Central European Institute of Technology, Faculty of Science, Masaryk University, Brno, Czechia.
Front Plant Sci. 2020 Jun 3;11:719. doi: 10.3389/fpls.2020.00719. eCollection 2020.
The tribe Aethionemeae is sister to all other crucifers, making it a crucial group for unraveling genome evolution and phylogenetic relationships within the crown group Brassicaceae. In this study, we extend the analysis of Brassicaceae genomic blocks (GBs) to whereby we identified unique block boundaries shared only with the tribe Arabideae. This was achieved using bioinformatic methods to analyze synteny between the recently updated genome sequence of and other high-quality Brassicaceae genome sequences. We show that compared to the largely conserved genomic structure of most non-polyploid Brassicaceae lineages, GBs are highly rearranged in . Furthermore, we detected similarities between the genomes of and , in which also a high number of genomic rearrangements compared to those of other Brassicaceae was found. These similarities suggest that tribe Arabideae, a clade showing conflicting phylogenetic position between studies, may have diverged before diversification of the other major lineages, and highlight the potential of synteny information for phylogenetic inference.
Aethionemeae族是所有其他十字花科植物的姊妹群，这使其成为解开十字花科冠群内基因组进化和系统发育关系的关键类群。在本研究中，我们将十字花科基因组块（GBs）的分析扩展到了[此处缺失具体内容]，从而确定了仅与Arabideae族共有的独特块边界。这是通过生物信息学方法分析[此处缺失具体物种]最近更新的基因组序列与其他高质量十字花科基因组序列之间的共线性来实现的。我们表明，与大多数非多倍体十字花科谱系基本保守的基因组结构相比，GBs在[此处缺失具体内容]中高度重排。此外，我们检测到[此处缺失具体内容]和[此处缺失具体内容]的基因组之间存在相似性，与其他十字花科植物相比，这两个物种也存在大量基因组重排。这些相似性表明，在研究中系统发育位置存在冲突的Arabideae族可能在其他主要谱系分化之前就已经分化，并突出了共线性信息在系统发育推断中的潜力。
