Sequencing and Characterization of Chloroplast Genome of Veronica polita

JIA Shouning, LI Xiang, BAO Haijuan, LI Shengxin, CHEN Wenjuan, ZHAO Guofu, WANG Shuangxi, XU Zhiwei, WANG Jiuli, LI Qien

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Life Science Research ›› 2023, Vol. 27 ›› Issue (5) : 426-434.

Sequencing and Characterization of Chloroplast Genome of Veronica polita

  • JIA Shouning, LI Xiang, BAO Haijuan, LI Shengxin, CHEN Wenjuan, ZHAO Guofu, WANG Shuangxi, XU Zhiwei, WANG Jiuli, LI Qien
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Abstract

Veronica polita Fr. is an important Tibetan medicinal herb. Herein, the chloroplast genome of V. polita was sequenced based on high-throughput sequencing, and its basic characteristics were analyzed using bioinformatics methods. The phylogeny of V. polita was studied using the protein coding sequences of chlo-roplast genomes. The results were as follows: 1) The complete chloroplast genome of V. polita is 150 191 bp in length, with a GC content of 37.9%. The lengths of large single copy (LSC), small single copy (SSC) and inverted repeat (IR) regions are 81 847 bp, 17 414 bp and 25 456 bp, respectively; 2) The chloroplast genome contains 134 genes, including 88 protein coding genes (PCGs), 8 ribosomal RNA (rRNA) genes and 38 trans-port RNA (tRNA) genes, including 2 pseudogenes; 3) A total of 26 529 codons were detected in the chloro-plast genome. Among them, 32 types of single codons have relative synonymous codon usage (RSCU) values less than 1, 30 types have RSCU values greater than 1, and 2 types have RSCU values equal to 1; 4) The IR boundary regions of Veronica are highly conservative, without obvious contraction or expansion; 5) Most varia-tions in chloroplast genomes of Veronica plants exist in intergenic regions; 6) V. polita is most closely related to V. persica. This study laid the foundation for species identification and genetic diversity research of the genus Veronica.

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Veronica polita / Tibetan medicine / chloroplast genome / sequencing / characterization

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JIA Shouning, LI Xiang, BAO Haijuan, LI Shengxin, CHEN Wenjuan, ZHAO Guofu, WANG Shuangxi, XU Zhiwei, WANG Jiuli, LI Qien. Sequencing and Characterization of Chloroplast Genome of Veronica polita. Life Science Research. 2023, 27(5): 426-434

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