摘要：SummaryMagnolia officinalis, a representative tall aromatic tree of the Magnoliaceae family, is a medicinal plant that is widely used in diverse industries from medicine to cosmetics. We report a chromosome-scale draft genome ofM. officinalis, in which ∼99.66% of the sequences were anchored onto 19 chromosomes with the scaffold N50 of 76.62 Mb. We found that a high proportion of repetitive sequences was a common feature of three Magnoliaceae with known genomic data. Magnoliids were a sister clade to eudicots-monocots, which provided more support for understanding the phylogenetic position among angiosperms. An ancient duplication event occurred in the genome ofM. officinalisand was shared with Lauraceae. Based on RNA-seq analysis, we identified several key enzyme-coding gene families associated with the biosynthesis of lignans in the genome. The construction of theM. officinalisgenome sequence will serve as a reference for further studies ofMagnolia,as well as other Magnoliaceae.Graphical abstractDisplay OmittedHighlights•We provide a chromosome-scale genome forMagnolia officinalis•We explore the phylogenetic position of Magnoliids•Analysis for lignan biosynthetic pathway is reported•We identify terpenes synthase in the floral fragrance composition of MagnoliaBiological sciences; Genetics; Evolutionary biology; Bioinformatics; Genomic analysis; Genomics
