The first two mitochondrial genomes for the genus Ramaria reveal mitochondrial genome evolution of Ramaria and phylogeny of Basidiomycota
文献类型: 外文期刊
作者: Li, Qiang 1 ; Li, Lijiao 1 ; Zhang, Ting 1 ; Xiang, Peng 1 ; Wu, Qian 1 ; Tu, Wenying 1 ; Bao, Zhijie 1 ; Zou, Liang 1 ; Chen, Cheng 2 ;
作者机构: 1.Chengdu Univ, Sch Food & Biol Engn, Key Lab Coarse Cereal Proc, Minist Agr & Rural Affairs, Chengdu, Sichuan, Peoples R China
2.Sichuan Acad Agr Sci, Inst Plant Protect, Key Lab Integrated Pest Management Crops Southwes, Minist Agr, 20 Jingjusi Rd, Chengdu 610066, Sichuan, Peoples R China
关键词: Phallomycetidae; Mitochondrial genome; Intron; Gene rearrangement; Evolution; Phylogenetic analysis
期刊名称:IMA FUNGUS ( 影响因子:8.044; 五年影响因子:6.756 )
ISSN: 2210-6340
年卷期: 2022 年 13 卷 1 期
页码:
收录情况: SCI
摘要: In the present study, we assembled and analyzed the mitogenomes of two Ramaria species. The assembled mitogenomes of Ramaria cfr. rubripermanens and R. rubella were circularized, with sizes of 126,497 bp and 143,271 bp, respectively. Comparative mitogenome analysis showed that intron region contributed the most (contribution rate, 43.74%) to the size variations of Ramaria mitogenomes. The genetic contents, gene length, tRNAs, and codon usages of the two Ramaria mitogenomes varied greatly. In addition, the evolutionary rates of different core protein coding genes (PCGs) in Phallomycetidae mitogenomes varied. We detected large-scale gene rearrangements between Phallomycetidae mitogenomes, including gene displacement and tRNA doubling. A total of 4499 bp and 7746 bp aligned fragments were detected between the mitochondrial and nuclear genomes of R. cfr. rubripermanens and R. rubella, respectively, indicating possible gene transferring events. We further found frequent intron loss/gain and potential intron transfer events in Phallomycetidae mitogenomes during the evolution, and the mitogenomes of R. rubella contained a novel intron P44. Phylogenetic analyses using both Bayesian inference (BI) and Maximum Likelihood (ML) methods based on a combined mitochondrial gene dataset obtained an identical and well-supported phylogenetic tree for Basidiomycota, wherein R. cfr. rubripermanens and Turbinellus floccosus are sister species. This study served as the first report on mitogenomes from the genus Ramaria, which provides a basis for understanding the evolution, genetics, and taxonomy of this important fungal group.
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