Genome assembly and annotation of <i>Polygonatum cyrtonema </i>Hua

The assembly comprises two phased haplotypes, totaling approximately 14.38 Gb across 22 pseudomolecules. The dataset includes the following files:</p><ul><li>Genome sequence (FASTA)</li><li>Gene annotation files (GFF3)</li><li>Coding sequences (CDS)</li><li>Protein sequences</li></ul><p dir="ltr">This genomic resource provides insights into the evolutionary mechanisms underlying the metabolic shift from starch to agavin-type fructan accumulation in <i>P. cyrtonema</i> rhizomes, driven by LTR retrotransposon expansion and neofunctionalization of a 6-SFT enzyme.

The data also support population genomic analyses of 261 accessions, revealing genetic structure and trait-associated loci. This work establishes a foundation for understanding carbon allocation strategies in shade-adapted perennial plants and for breeding functional staple foods.</p>