生物
基因组
基因
系统发育树
遗传学
线粒体DNA
基因间区
转移RNA
核糖体RNA
核糖核酸
作者
Yang Xu,Yi Dong,Wenqiang Cheng,Kai-Yun Wu,Haidong Gao,Lei Liu,Lei Xu,Gong Bangchu
出处
期刊:Heliyon
[Elsevier]
日期:2022-07-01
卷期号:8 (7): e09870-e09870
被引量:2
标识
DOI:10.1016/j.heliyon.2022.e09870
摘要
Abstract
Plant mitochondrial genomes are a valuable source of genetic information for a better understanding of phylogenetic relationships. However, no mitochondrial genome of any species in Ebenaceae has been reported. In this study, we reported the first mitochondrial genome of an Ebenaceae model plant Diospyros oleifera. The mitogenome was 493,958 bp in length, contained 39 protein-coding genes, 27 transfer RNA genes, and 3 ribosomal RNA genes. The rps2 and rps11 genes were missing in the D. oleifera mt genome, while the rps10 gene was identified. The length of the repetitive sequence in the D. oleifera mt genome was 31 kb, accounting for 6.33%. A clear bias in RNA-editing sites were found in the D. oleifera mt genome. We also detected 28 chloroplast-derived fragments significantly associated with D. oleifera mt genes, indicating intracellular tRNA genes transferred frequently from chloroplasts to mitochondria in D. oleifera. Phylogenetic analysis based on the mt genomes of D. oleifera and 27 other taxa reflected the exact evolutionary and taxonomic status of D. oleifera. Ka/Ks analysis revealed that 95.16% of the protein-coding genes in the D. oleifera mt genome had undergone negative selections. But, the rearrangement of mitochondrial genes has been widely occur among D. oleifera and these observed species. These results will lay the foundation for identifying further evolutionary relationships within Ebenaceae.
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