Assembly and analysis of the first complete mitochondrial genome sequencing of main Tea-oil Camellia cultivars Camellia drupifera (Theaceae): revealed a multi-branch mitochondrial conformation for Camellia
文献类型： 外文期刊
作者： Liang, Heng 1 ; Qi, Huasha 1 ; Chen, Jiali 1 ; Wang, Yidan 7 ; Liu, Moyang 2 ; Sun, Xiuxiu 1 ; Wang, Chunmei 1 ; Xia, Tengfei 1 ; Feng, Xuejie 3 ; Feng, Shiling 6 ; Chen, Cheng 2 ; Zheng, Daojun 1 ;
作者机构： 1.Hainan Acad Agr Sci, Inst Trop Hort Res, Haikou 571100, Peoples R China
2.Shanghai Jiao Tong Univ, Sch Agr & Biol, Shanghai 200240, Peoples R China
3.Hainan Acad Agr Sci, Sanya Inst, Sanya 572025, Peoples R China
4.Key Lab Trop Special Econ Plant Innovat & Utilizat, Haikou 571100, Peoples R China
5.Natl Germplasm Resource Chengmai Observat & Expt S, Chengmai 571929, Peoples R China
6.Sichuan Agr Univ, Coll Life Sci, Yaan 625014, Sichuan, Peoples R China
7.Tech Univ Munich, Sch Life Sci, D-85354 Freising Weihenstephan, Germany
关键词： Mitochondrial genome; Tea-oil Camellia; Comparative genomics
期刊名称：BMC PLANT BIOLOGY （ 影响因子：4.8； 五年影响因子：5.4 ）
ISSN： 1471-2229
年卷期： 2025 年 25 卷 1 期
页码：
收录情况： SCI
摘要： BackgroundTea-oil Camellia within the genus Camellia is renowned for its premium Camellia oil, often described as "Oriental olive oil". So far, only one partial mitochondrial genomes of Tea-oil Camellia have been published (no main Tea-oil Camellia cultivars), and comparative mitochondrial genomic studies of Camellia remain limited.ResultsIn this study, we first reconstructed the entire mitochondrial genome of C. drupifera to gain insights into its genetic structure and evolutionary history. Through our analysis, we observed a characteristic multi-branched configuration in the mitochondrial genomes of C. drupifera. A thorough examination of the protein-coding regions (PCGs) across Camellia species identified gene losses that occurred during their evolution. Notably, repeat sequences showed a weak correlation between the abundance of simple sequence repeats (SSRs) and genome size of Camellia. Additionally, despite of the considerable variations in the sizes of Camellia mitochondrial genomes, there was little diversity in GC content and gene composition. The phylogenetic tree derived from mitochondrial data was inconsistent with that generated from chloroplast data.ConclusionsIn conclusion, our study provides valuable insights into the molecular characteristics and evolutionary mechanisms of multi-branch mitochondrial structures in Camellia. The high-resolution mitogenome of C. drupifera enhances our understanding of multi-branch mitogenomes and lays a solid groundwork for future advancements in genomic improvement and germplasm innovation within Tea-oil Camellia.
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