Characterization of the complete chloroplast genome sequence of Asparagus densiflorus ‘Sprengeri’ Huttleston 1970 (Asparagaceae)

Asparagus densiflorus ‘Sprengeri’ is an economically important ornamental and medicinal plant within the genus Asparagus. In this study, we sequenced and assembled its complete chloroplast (cp) genome using the Illumina NovaSeq platform. The circular cp genome is 157,116 bp in length with a GC content of 38%, comprising a large single-copy (LSC) region (85,327 bp), a small single-copy (SSC) region (18,677 bp), and two inverted repeat (IR) regions (26,556 bp each). The genome encodes 133 functional genes, including 87 protein-coding genes, 38 tRNA genes, and 8 rRNA genes. Phylogenetic analysis indicates that A. densiflorus ‘Sprengeri’ is most closely related to A. densiflorus ‘Myers’ and A. falcatus, suggesting a shared evolutionary lineage. This study will not only shed light on A. densiflorus ‘Sprengeri’’s evolutionary position but also provide valuable chloroplast genomic information for future studies into the origins and diversification of the genus Asparagus and the Asparagaceae family.