Dynamic genome evolution in a model fern

编号 040037001

推送时间 20221121

研究领域 森林培育 

年份 2022 

类型 期刊 

语种 英语

标题 Dynamic genome evolution in a model fern

来源期刊 Nature Plants

期 第370期

发表时间 20220901

关键词 Dynamic genome;  fern;  Ceratopteris richardii;  plant biology; 

摘要 The large size and complexity of most fern genomes have hampered efforts to elucidate fundamental aspects of fern biology and land plant evolution through genome-enabled research. Here we present a chromosomal genome assembly and associated methylome, transcriptome and metabolome analyses for the model fern species Ceratopteris richardii. The assembly reveals a history of remarkably dynamic genome evolution including rapid changes in genome content and structure following the most recent whole-genome duplication approximately 60 million years ago. These changes include massive gene loss, rampant tandem duplications and multiple horizontal gene transfers from bacteria, contributing to the diversification of defence-related gene families. The insertion of transposable elements into introns has led to the large size of the Ceratopteris genome and to exceptionally long genes relative to other plants. Gene family analyses indicate that genes directing seed development were co-opted from those controlling the development of fern sporangia, providing insights into seed plant evolution. Our findings and annotated genome assembly extend the utility of Ceratopteris as a model for investigating and teaching plant biology.

服务人员 孙小满

服务院士 尹伟伦

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