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Evolutionary patterns of chimeric retrogenes in Oryza species
Zhou, Yanli1; Zhang, Chengjun1,2
Corresponding AuthorZhang, Chengjun(
AbstractChimeric retroposition is a process by which RNA is reverse transcribed and the resulting cDNA is integrated into the genome along with flanking sequences. This process plays essential roles and drives genome evolution. Although the origination rates of chimeric retrogenes are high in plant genomes, the evolutionary patterns of the retrogenes and their parental genes are relatively uncharacterised in the rice genome. In this study, we evaluated the substitution ratio of 24 retrogenes and their parental genes to clarify their evolutionary patterns. The results indicated that seven gene pairs were under positive selection. Additionally, soon after new chimeric retrogenes were formed, they rapidly evolved. However, an unexpected pattern was also revealed. Specifically, after an undefined period following the formation of new chimeric retrogenes, the parental genes, rather than the new chimeric retrogenes, rapidly evolved under positive selection. We also observed that one retro chimeric gene (RCG3) was highly expressed in infected calli, whereas its parental gene was not. Finally, a comparison of our Ka/Ks analysis with that of other species indicated that the proportion of genes under positive selection is greater for chimeric retrogenes than for non-chimeric retrogenes in the rice genome.
Indexed BySCI ; SCI
WOS IDWOS:000499196200001
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Document Type期刊论文
Corresponding AuthorZhang, Chengjun
Affiliation1.Chinese Acad Sci, Kunming Inst Bot, Germplasm Bank Wild Species, 132 Lanhei Rd, Kunming 650201, Yunnan, Peoples R China
2.Chinese Acad Sci, Kunming Inst Bot, Haiyan Engn & Technol Ctr, Jiaxing 314300, Zhejiang, Peoples R China
Recommended Citation
GB/T 7714
Zhou, Yanli,Zhang, Chengjun. Evolutionary patterns of chimeric retrogenes in Oryza species[J]. SCIENTIFIC REPORTS,2019,9:12.
APA Zhou, Yanli,&Zhang, Chengjun.(2019).Evolutionary patterns of chimeric retrogenes in Oryza species.SCIENTIFIC REPORTS,9,12.
MLA Zhou, Yanli,et al."Evolutionary patterns of chimeric retrogenes in Oryza species".SCIENTIFIC REPORTS 9(2019):12.
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