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第一作者:Shi-Pin Chen
第一单位:福建农林大学
通讯作者:Zhong-Jian Liu
Abstract
背景回顾:Lauraceae includes the genus Phoebe, and the family is linked to the evolution of magnoliids.
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.
摘 要
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。
通讯作者
**刘仲健** 个人简介: 1978-1982年,华南农业大学,学士。 研究方向: 被子植物进化;植物分子系统学;基因组学;开花分子调控机制。
doi: 10.1038/s41438-020-00368-z
Journal: Horticulture Research
Published date: September 01, 2020
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