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Updated: Nov 20, 2025

Novel Sequence Discovery by Subtractive Genomics
Published on: January 25, 2019
The complete chloroplast genome sequence of the medicinal and economic plant woad Isatis indigotica (Brassicaceae)
1Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest China, College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi, P.R. China.
Abstract:
Chloroplast (cp) genome sequences provide a valuable source for phylogenetic analysis. It becomes a popular useful tool for population and phylogeny in recently report. Here, the complete chloroplast genome of the Isatis indigotica has been reconstructed from the whole-genome Illumina sequencing data. The circular genome is 156,670 bp in size and comprises a pair of inverted repeat (IR) regions of 26,995 bp each, a large single-copy (LSC) region of 84,907 bp and a small single-copy (SSC) region of 17,773 bp. The total GC content is 36.5%, while the corresponding values of the LSC, SSC and IR region are 34.2%, 29.7% and 42.3%, respectively. The chloroplast genome contains 140 genes, including 94 protein-coding genes. The phylogenetic analysis showed a strong sister relationship with Raphanus sativus in Brassicaceae. These findings provide a foundation for further investigation of cp genome evolution in I. indigotica and other higher plants.
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