数字农科院2.0

Reference genome assemblies reveal the origin and evolution of allohexaploid oat

文献类型： 外文期刊

作者： Peng, Yuanying;Yan, Honghai;Guo, Laichun;Deng, Cao;Wang, Chunlong;Wang, Yubo;Kang, Lipeng;Zhou, Pingping;Yu, Kaiquan;Dong, Xiaolong;Liu, Xiaomeng;Sun, Zongyi;Peng, Yun;Zhao, Jun;Deng, Di;Xu, Yinghong;Li, Ying;Jiang, Qiantao;Li, Yan;Wei,

作者机构：

期刊名称： NATURE GENETICS

ISSN： 1061-4036

年卷期： 2022 年

页码：

收录情况： SCIE（2022版）

摘要： Common oat (Avena sativa) is an important cereal crop serving as a valuable source of forage and human food. Although reference genomes of many important crops have been generated, such work in oat has lagged behind, primarily owing to its large, repeat-rich polyploid genome. Here, using Oxford Nanopore ultralong sequencing and Hi-C technologies, we have generated a reference-quality genome assembly of hulless common oat, comprising 21 pseudomolecules with a total length of 10.76 Gb and contig N50 of 75.27 Mb. We also produced genome assemblies for diploid and tetraploid Avena ancestors, which enabled the identification of oat subgenomes and provided insights into oat chromosomal evolution. The origin of hexaploid oat is inferred from whole-genome sequencing, chloroplast genomes and transcriptome assemblies of different Avena species. These findings and the high-quality reference genomes presented here will facilitate the full use of crop genetic resources to accelerate oat improvement. A reference-quality genome assembly of hexaploid oat variety 'Sanfensan' and genome assemblies of its diploid and tetraploid Avena ancestors provide insights into the evolutionary history of allohexaploid oat.

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