Characterization of the complete chloroplast genome sequence of Fritillaria delavayi, an ethnomedicinal plant in China.

Fritillaria delavayi has been widely used as a traditional Chinese medicine (TCM) to treat respiratory diseases for thousands of years. In this study, the complete chloroplast genome of F. delavayi was assembled. The circular genome is 151,938 bp in size, which is comprised of one large single-copy (LSC) region of 81,757 bp and one small single-copy (SSC) region of 17,537 bp and separated by a pair of inverted repeat (IR) regions of 26,322 bp. A total of 112 unique genes (78 protein-coding, 30 tRNA, and 4 rRNA) are predicted and 19 of them are duplicated in IR regions. The overall GC content is 37.0% while the GC content of the LSC, SSC, and IR regions are 34.8, 30.5, and 42.5%, separately. Phylogenetic analysis indicated that F. delavayi was closely related to F. cirrhosa.

梭砂贝母作为一种传统中药用于治疗呼吸系统疾病已有数千年历史。在本研究中，组装了梭砂贝母的完整叶绿体基因组。该环状基因组大小为151938bp，由一个81757bp的大单拷贝（LSC）区、一个17537bp的小单拷贝（SSC）区以及一对26322bp的反向重复（IR）区隔开。共预测出112个独特基因（78个蛋白质编码基因、30个tRNA基因和4个rRNA基因），其中19个在IR区重复。总体GC含量为37.0%，而LSC、SSC和IR区的GC含量分别为34.8%、30.5%和42.5%。系统发育分析表明，梭砂贝母与川贝母亲缘关系密切。