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Bulletin of Botanical Research ›› 2025, Vol. 45 ›› Issue (6): 873-887.doi: 10.7525/j.issn.1673-5102.2025.06.005

• Original Paper • Previous Articles    

Structure Characterization and Phylogeny of Chloroplast Genomes in Tamaricaceae

Jiahuan LI1, Qingqing ZHENG2, Rongrong GUAN2, Yuping LIU1, Xu SU1, Faqi ZHANG2,3()   

  1. 1.School of Life Sciences,Qinghai Normal University,Xining 810008
    2.Xining Botanical Garden,Xining 810008
    3.Northwest Institute of Plateau Biology,Chinese Academy of Sciences,Xining 810008
  • Received:2025-03-28 Online:2025-11-20 Published:2025-11-27
  • Contact: Faqi ZHANG E-mail:fqzhang@nwipb.cas.cn

Abstract:

Structural characteristics of chloroplast genome could reflect the phylogenetic and evolutionary relationships among plants. In this study, the chloroplast genomes of seven species from Tamaricaceae were sequenced and assembled by the Illumina HiSeq platform. Combined with published chloroplast genome sequences from Tamaricaceae and its allies, we conducted comparative analyses of chloroplast genome sequence variation, structural characteristics, relative synonymous codon usage of protein-coding genes, and phylogenetic relationships. The results showed that the ten chloroplast genomes of Tamaricaceae exhibited a quadripartite structure, with a total length ranging from 154 684 bp to 156 178 bp. These chloroplast genomes contained approximately 130 protein coding genes, including 111 non-redundant genes. The GC content and relative synonymous codon usage(RSCU) were consistent with those of typical angiosperm chloroplast genomes. Moreover, we identified 27-54 simple sequence repeats(SSRs) in each genome, which are predominantly composed of A/T bases. Phylogenetic results supported Tamarix austromongolica and Myrtama elegans as members of Myricaria. The results revealed the conserved chloroplast genome structures across the ten Tamaricaceae species, with distinct interspecific variations that offer valuable information for resolving phylogenetic relationships and identifying species within this family.

Key words: Tamaricaceae, chloroplast genome, sequence characterization, phylogeny

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