Assembly and Comparative Analysis of the Complete Mitochondrial Genome of Ilex macrocarpa
文献类型： 外文期刊
作者： Wang, Yuxiao 1 ; Sun, Ning 1 ; Shi, Wenxi 1 ; Ma, Qiuyue 3 ; Sun, Liyong 1 ; Hao, Mingzhuo 1 ; Bi, Changwei 1 ; Li, Shuxian 1 ;
作者机构： 1.Nanjing Forestry Univ, Forestry & Grass Coll, Nanjing 210037, Peoples R China
2.Nanjing Forestry Univ, Coinnovat Ctr Sustainable Forestry Southern China, Nanjing 210037, Peoples R China
3.Jiangsu Acad Agr Sci, Inst Leisure Agr, Nanjing 210014, Peoples R China
4.Jiangsu Qinghao Landscape Hort Co Ltd, Nanjing 210037, Peoples R China
关键词： Ilex macrocarpa; mitogenome; repeats; phylogenetic analysis
期刊名称：FORESTS （ 2022影响因子：2.9； 五年影响因子：3.0 ）
年卷期： 2023 年 14 卷 12 期
收录情况： SCI
摘要： The plant mitochondrial genome (mitogenome) has a complex organization and carries genetic traits of value in exploiting genetic resources. In this study, the Ilex macrocarpa mitogenome was sequenced and assembled to understand the genetic diversity and phylogenetic relationship. The mitogenome has a cyclic molecular structure and is 539,461 bp long with a GC content of 45.53%. It contained 39 protein-coding proteins, 19 tRNA genes, and 3 rRNA genes. The 146 simple sequence repeats and 591 dispersed repeat sequences were identified in the mitogenome. Codon usage analysis revealed a preference for codons ending in A/T. A total of 517 C to U RNA editing sites were predicted, with nad4 and ccmB being edited most frequently (39 times). Phylogenetic analysis via mitochondrial protein-coding genes showed that the Aquifoliales order contains sister plants to Lamiales, Solanales, and Gentianales. In addition, the conflicts between chloroplast and mitochondrial phylogeny were also observed. This study provides a theoretical framework for understanding the evolution, classification, and identification of the Ilex genus, which lays an important foundation for future molecular breeding investigations.
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