iScience
Volume 24, Issue 9, 24 September 2021, 102997
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Article
The chromosome-scale genome of Magnolia officinalis provides insight into the evolutionary position of magnoliids

https://doi.org/10.1016/j.isci.2021.102997Get rights and content
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Highlights

  • We provide a chromosome-scale genome for Magnolia 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 Magnolia

Summary

Magnolia 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 of M. 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 of M. officinalis and 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 the M. officinalis genome sequence will serve as a reference for further studies of Magnolia, as well as other Magnoliaceae.

Subject areas

Biological sciences
Genetics
Evolutionary biology
Bioinformatics
Genomic analysis
Genomics

Data and code availability

The accession number for the genome assembly and raw reads reported in this paper is GenBank: PRJNA752832 and PRJNA752923, respectively. This paper does not report original code. Any additional information required to reanalyze the data reported in this paper is available from the lead contact upon request.

Cited by (0)

5

These authors contributed equally

6

Lead contact