Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (4): 821-830.DOI: 10.3969/j.issn.1004-1524.2023.04.09

• Horticultural Science • Previous Articles     Next Articles

Analysis on codon usage patterns of chloroplast genome of Lonicera japonica cv. Damaohua

ZHANG Jiaqiang1(), LIU Huichun1, WANG Jie2, XU Wenting1, ZHOU Jianghua1, ZHU Kaiyuan1,*()   

  1. 1. Zhejiang Institute of Landscape Plants and Flowers, Hangzhou 311251, China
    2. The Crop Technology Extension Center of Suichang County, Suichang 323300, Zhejiang, China
  • Received:2022-01-26 Online:2023-04-25 Published:2023-05-05

Abstract:

By analyzing the codon usage bias of the chloroplast genome of Lonicera japonica cv. Damaohua, we explored the main factors affecting the formation of its codon bias, and provided references for the study of the phylogeny of Lonicera japonica and the evolution of codons in the chloroplast genome. The codon usage bias of 50 chloroplast protein-coding genes of Lonicera japonica cv. Damaohua were analyzed using the bioinformatics software. The GC content of the chloroplast genome of Lonicera japonica cv. Damaohua was 39.18%, the ENc value was 48.81, and the bias for codon usage was weak. The correlation coefficient of GC and GC1, GC2, GC3, GC3s, GC and CAI all reached significant or extremely significant levels. There were 30 codons with RSCU values greater than 1, of which, 28 condons ending with A and T. Comprehensive ENc-plot analysis, PR2-plot analysis, neutral plot analysis and correspondence analysis showed that during the formation of codon usage bias in the chloroplast genome of Lonicera japonica cv. Damaohua, selection pressure and mutations and other factors played an important role together. Based on the analysis of relative synonymous codon usage, 30 high-frequency codons and 5 optimal codons were determined, the optimal codons all ended with A or T. This study clarified that the codon usage bias of the chloroplast genome of Lonicera japonica cv. Damaohua was jointly affected by factors such as selection pressure and mutation, and screened out five optimal codons.

Key words: Lonicera japonica, codon usage pattern, chloroplast genome, optimal codon

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