主要研究：We sequenced the genome of Phoebe bournei Nanmu.

结果1-组装+注释：The assembled genome size was 989.19 Mb, with a contig N50 value of 2.05 Mb. A total of 28,198 protein-coding genes were annotated in P. bournei.

结果2-WGD：Whole-genome duplication (WGD) analysis showed that Lauraceae has experienced two WGD events; the older WGD event occurred just before the divergence of Lauraceae and Magnoliales, and the more recent WGD was shared by all lineages of Lauraceae.

结果3-系统发育：The phylogenetic tree showed that magnoliids form a sister clade to monocots and eudicots.

结果4-基因鉴定：We also identified 63 MADS-box genes, including AGL12-like genes that may be related to the regulation of P. bournei roots and FIN219-like genes encoding GH3 proteins, which are involved in photomorphogenesis. SAUR50-like genes involved in light signal-mediated pedicel or stem development were also identified. Four ATMYB46- and three PtrEPSP-homologous genes related to lignin biosynthesis were identified. These genes may be associated with the formation of straight trunks in P. bournei.

结论：Overall, the P. bournei reference genome provides insight into the origin, evolution, and diversification of Phoebe and other magnoliids.

樟科（Lauraceae）包含楠属（Phoebe）植物，属于木兰类植物。本文中，作者对楠木（Phoebe bournei）进行了全基因组测序，组装大小约为989.19Mb，contig N50的大小约为2.05Mb。楠木基因组共编码28198个蛋白编码基因。全基因组复制分析显示樟科经历了两次全基因组复制事件，第一次WGD发生与樟科和木兰目分化之前不久，而后一次的WGD则是所有樟科植物共享的。系统发育树显示木兰类植物与单、双子叶植物形成姊妹枝。作者还鉴定了63个MADS-box基因，包括一个可能参与楠木根调控的基因类AGL12和一个参与植物光形态发生的GH3蛋白编码基因类FIN219。另外，还鉴定了一个类SAUR50基因，该基因参与了光信号介导的花梗或茎发育；以及四个ATMYB46和三个PtrEPSP同源基因，参与木质素的生物合成。这些基因可能与楠木笔直树干的形成有关。综上，本文报道的楠木基因组为楠属植物及其它木兰类植物的起源、演化和多样化提供了新的视野。