Study : Chimonanthus salicifolius isolate:LYLM-1 Genome sequencing and assembly


Chimonanthus salicifolius isolate:LYLM-1 Genome sequencing and assembly
Chimonanthus salicifolius, a member of the family Calycanthaceae of magnoliids, is one of the most famous traditional medicinal plants in Eastern China. Here, we report a chromosome-level genome assembly of C. salicifolius, comprising 820.1 Mb of genomic sequence with contig N50 value up to 2.2 Mb and containing 36,651 annotated protein-coding genes. Comparative and evolutionary analyses revealed that C. salicifolius was sister to the eudicots and that two whole-genome duplication events occurred approximately 88 and 69 million years ago. Notably, long genes that the gene length >20 kb were abundant in the C. salicifolius genome. These long genes are involved in many important plant growth and development processes and are widely present among magnoliids and basal angiosperms, indicating that they might represent a characteristic of primitive angiosperm genomes. We also investigate the gene expression profiles of flowering and flavonoid synthesis genes, including chalcone synthase (CHS) and flavonol synthase (FLS), which might play important roles in the flavonoid metabolic pathway. The data obtained in this study not only provide a representative genome sequence from the magnoliids but also open the door to functional genomic research and molecular breeding of C. salicifolius.


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