The first complete mitochondrial genome of Grossulariaceae: Molecular features, structure recombination, and genetic evolution
文献类型： 外文期刊
作者： Lu, Guilong 1 ; Wang, Wenhua 2 ; Zhang, Shanshan 2 ; Yang, Guang 3 ; Zhang, Kun 3 ; Que, Youxiong 4 ; Deng, Lan 2 ;
作者机构： 1.Henan Inst Sci & Technol, Sch Hort & Landscape Architecture, Xinxiang 453003, Peoples R China
2.Tibet Acad Agr & Anim Husb Sci, Lhasa 890032, Peoples R China
3.Heilongjiang Acad Agr Sci, Inst Rural Revitalizat Sci & Technol, Harbin 150086, Peoples R China
4.Fujian Agr & Forestry Univ, Coll Agr, Fuzhou 350002, Peoples R China
关键词： Ribes nigrum; Mitogenome; Molecular feature; Gene transfer; Evolution analysis
期刊名称：BMC GENOMICS （ 影响因子：3.5； 五年影响因子：4.1 ）
ISSN： 1471-2164
年卷期： 2024 年 25 卷 1 期
页码：
收录情况： SCI
摘要： Background Mitochondria play crucial roles in the growth, development, and adaptation of plants. Blackcurrant (Ribes nigrum L.) stands out as a significant berry species due to its rich nutritional profile, medicinal properties, and health benefits. Despite its importance, the mitochondrial genome of blackcurrant remains unassembled. Results This study presents the first assembly of the mitochondrial genome of R. nigrum in the Grossulariaceae family. The genome spans 450,227 base pairs (bp) and encompasses 39 protein-coding genes (PCGs), 19 transfer RNAs (tRNAs), and three ribosomal RNAs (rRNAs). Protein-coding regions constitute 8.88% of the entire genome. Additionally, we identified 180 simple sequence repeats, 12 tandem repeats, and 432 pairs of dispersed repeats. Notably, the dispersed sequence R1 (cotig3, 1,129 bp) mediated genome recombination, resulting in the formation of two major conformations, namely master and double circles. Furthermore, we identified 731 C-to-U RNA editing sites within the PCGs. Among these, cox1-2, nad1-2, and nad4L-2 were associated with the creation of start codons, whereas atp6-718 and rps10-391 were linked to termination codons. We also detected fourteen plastome fragments within the mitogenome, constituting 1.11% of the total length. Phylogenetic analysis suggests that R. nigrum might have undergone multiple genomic reorganization and/or gene transfer events, resulting in the loss of two PCGs (rps2 and rps11) during its evolutionary history. Conclusions This investigation unveils the molecular characteristics of the R. nigrum mitogenome, shedding light on its evolutionary trajectory and phylogenetic implications. Furthermore, it serves as a valuable reference for evolutionary research and germplasm identification within the genus.
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