Assembly and comparative analysis of the first complete mitochondrial genome of Salix psammophila, a good windbreak and sand fixation shrub
文献类型： 外文期刊
作者： Qiao, Hongxia 1 ; Chen, Yajuan 1 ; Wang, Ruiping 4 ; Zhang, Wei 1 ; Zhang, Zhang 1 ; Yu, Fengqiang 4 ; Yang, Haifeng 3 ; Liu, Guiming 1 ; Zhang, Jiewei 1 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Beijing, Peoples R China
2.Beijing Key Lab Agr Genet Resources & Biotechnol, Inst Biotechnol, Beijing, Peoples R China
3.Inner Mongolia Agr Univ, Coll Forestry, Hohhot, Peoples R China
4.Ordos Forestry & Grassland Dev Ctr, Ordos, Peoples R China
关键词： Salix psammophila; Salicaceae; mitochondrial genome; Pacbio HiFi; comparative analysis
期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：4.8； 五年影响因子：5.7 ）
ISSN： 1664-462X
年卷期： 2024 年 15 卷
页码：
收录情况： SCI
摘要： Salix psammophila, commonly known as the sandlive willow, is a vital shrub species within the Salicaceae family, particularly significant for its ecological role in regions susceptible to desertification and sandy soils. In this study, we assembled the complete S. psammophila mitochondrial genome using Pacbio HiFi third-generation sequencing data. The genome was found to be a typical single circular structure, with a total length of 715,555 bp and a GC content of 44.89%. We annotated 33 unique protein-coding genes (PCGs), which included 24 core mitochondrial genes and 9 variable genes, as well as 18 tRNA genes (5 of which were multicopy genes) and 3 rRNA genes. Comparative analysis of the PCGs from the mitochondrial genomes of S. psammophila, Populus deltoides, Populus simonii, Salix wilsonii, and Salix suchowensis revealed that these genes are relatively conserved within the Salicaceae family, with variability primarily occurring in the ribosomal protein genes. The absence of the rps14, which encodes a ribosomal protein, may have played a role in the evolution of stress tolerance in Salicaceae plants. Additionally, we identified 232 SSRs, 19 tandem repeat sequences, and 236 dispersed repeat sequences in the S. psammophila mitochondrial genome, with palindromic and forward repeats being the most abundant. The longest palindromic repeat measured 260 bp, while the longest forward repeat was 86,068 bp. Furthermore, 324 potential RNA editing sites were discovered, all involving C-to-U edits, with the nad4 having the highest number of edits. These findings provide valuable insights into the phylogenetic and genetic research of Salicaceae plants.
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