4.5 Article

Gene fusion as an important mechanism to generate new genes in the genus Oryza

期刊

GENOME BIOLOGY
卷 23, 期 1, 页码 -

出版社

BMC
DOI: 10.1186/s13059-022-02696-w

关键词

Fusion gene; Oryza; Evolutionary patterns; Phenotype

资金

  1. National Natural Science Foundation of China [31571311, 32000180]
  2. Youth Innovation Promotion Association CAS [2021394]
  3. Yunnan Fundamental Research Projects [202001AU070075]
  4. Yunnan Young & Elite Talents Project [YNWR-QNBJ-2019-268]
  5. CAS Scholarship
  6. NSF [1026200, 1051826]

向作者/读者索取更多资源

This study detects new fusion genes that may drive phenotype evolution in Oryza, providing novel insights into the genome evolution of Oryza.
Background Events of gene fusion have been reported in several organisms. However, the general role of gene fusion as part of new gene origination remains unknown. Results We conduct genome-wide interrogations of four Oryza genomes by designing and implementing novel pipelines to detect fusion genes. Based on the phylogeny of ten plant species, we detect 310 fusion genes across four Oryza species. The estimated rate of origination of fusion genes in the Oryza genus is as high as 63 fusion genes per species per million years, which is fixed at 16 fusion genes per species per million years and much higher than that in flies. By RNA sequencing analysis, we find more than 44% of the fusion genes are expressed and 90% of gene pairs show strong signals of purifying selection. Further analysis of CRISPR/Cas9 knockout lines indicates that newly formed fusion genes regulate phenotype traits including seed germination, shoot length and root length, suggesting the functional significance of these genes. Conclusions We detect new fusion genes that may drive phenotype evolution in Oryza. This study provides novel insights into the genome evolution of Oryza.

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