Abstract:
:Genes in plant secondary metabolic pathways enable biosynthesis of a range of medically and industrially important compounds, and are often clustered on chromosomes. Here, we study genomic clustering in the benzylisoquinoline alkaloid (BIA) pathway in opium poppy (Papaver somniferum), exploring relationships between gene expression, copy number variation, and metabolite production. We use Hi-C to improve the existing draft genome assembly, yielding chromosome-scale scaffolds that include 35 previously unanchored BIA genes. We find that co-expression of BIA genes increases within clusters and identify candidates with unknown function based on clustering and covariation in expression and alkaloid production. Copy number variation in critical BIA genes correlates with stark differences in alkaloid production, linking noscapine production with an 11-gene deletion, and increased thebaine/decreased morphine production with deletion of a T6ODM cluster. Our results show that the opium poppy genome is still dynamically evolving in ways that contribute to medically and industrially important phenotypes.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Li Q,Ramasamy S,Singh P,Hagel JM,Dunemann SM,Chen X,Chen R,Yu L,Tucker JE,Facchini PJ,Yeaman Sdoi
10.1038/s41467-020-15040-2subject
Has Abstractpub_date
2020-03-04 00:00:00pages
1190issue
1issn
2041-1723pii
10.1038/s41467-020-15040-2journal_volume
11pub_type
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