药用植物白蓝翠雀花的叶绿体基因组特征及系统发育分析

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中图分类号：Q949.95 文献标识码：A 文章编号：1007-0435（2026）04-1168-13

doi：10.11733/j.issn.1007-0435.2026.04.004

Abstract：The medicinal plant Delphinium albocoeruleum is rich in diterpenoid alkaloids，and possesses signifi cant medicinal and ecological values.However，studies on the characteristics ofits chloroplast genome and systematic taxonomic status stillremain scarce. In this study，the complete chloroplast genome of this species was sequenced and characterized for the first time，and comparative analyses within Delphinium and related taxa were also conducted. The results indicated that the chloroplast genome of D . albocoeruleum had a total length of 154 258 bp，and exhibited a typical quadripartite structure，including alarge single copy（LSC） region of 84 847 bp，a smallsinglecopy（SSC） regionof16301bp，and an inverted repeat（IR）regionof 26 555 bp.The total GC content was 38. 25% . A total of 13l genes were annotated， including a unique ycfl pseudogene，which presented a boundary diferentiation pattrn characterized by truncation at the IRb/SSC boundary and intact function at the SSC/IRa boundary. We identified 243 simple sequence repeats （SSR） loci， with 67.1% of these SSR loci concentrated in theLSC region and A/T mononucleotide repeats being the dominant type. Furthermore，seven positive selection genes （e. g. ，matK，ndhD） and 15 highly divergent regions （Pi>0.020 ） were detected，indicating that the genome was overall conserved but local variations. Phylogenetic analysis demonstrated that D .albocoeruleum had the closest genetic relationship with D . candelabrum. These results provide an important basis for research on the phylogeny， genetic evolution，and geographical origin of the tribe Delphineae.

Key words：Delphinium albocoeruleum;Chloroplast genome;Phylogenetic analysis;The tribe Delphineae

药用植物是我国重要的生物资源之一，在缓解人类健康问题方面发挥不可替代的作用[1]。（剩余17479字）