Teng Ke, Guo Qiang, Liu Lingyun, Guo Yidi, Xu Yue, Hou Xincun, Teng Wenjun, Zhang Hui, Zhao Chunqiao, Yue Yuesen, Wen Haifeng, Wu Juying, Fan Xifeng
Institute of Grassland, Flowers, and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China.
Front Plant Sci. 2023 Aug 23;14:1195479. doi: 10.3389/fpls.2023.1195479. eCollection 2023.
is an important forage grass resource, which plays a vital role in ecological environment improvement. Therefore, the acquisition of genome resources is conducive to the study of the adaptability of species in ecological remediation and forage breeding development. Here we assembled a cv. 'Liqiu' genome at the chromosome level with a size of approximately 845.71 Mb, contig N50 of 84.83Mb, and genome integrity of 99.13% as assessed by CEGMA. A total of 833.41-Mb sequences were mounted on nine chromosomes by Hi-C technology. In total, 60.66% of the repetitive sequences and 34,312 genes were predicted. The genomic evolution analysis showed that cv. 'Liqiu' was isolated from Setaria 7.53-13.80 million years ago and from Cenchrus 5.33-8.99 million years ago, respectively. The whole-genome event analysis showed that cv. 'Liqiu' underwent two whole-genome duplication (WGD) events in the evolution process, and the duplication events occurred at a similar time to that of and . The completion of the genome sequencing of cv. 'Liqiu' provides data support for mining high-quality genetic resources of and provides a theoretical basis for the origin and evolutionary characteristics of .
是一种重要的饲草资源，在生态环境改善中发挥着至关重要的作用。因此，获取其基因组资源有利于研究该物种在生态修复和饲草育种发展中的适应性。在此，我们在染色体水平上组装了一个‘立秋’品种的基因组，大小约为845.71 Mb，重叠群N50为84.83 Mb，通过CEGMA评估基因组完整性为99.13%。通过Hi-C技术，共833.41 Mb的序列挂载到了9条染色体上。总共预测了60.66%的重复序列和34312个基因。基因组进化分析表明，‘立秋’品种分别在753 - 1380万年前与狗尾草属分离，在533 - 899万年前与蒺藜草属分离。全基因组事件分析表明，‘立秋’品种在进化过程中经历了两次全基因组复制（WGD）事件，且这些复制事件发生的时间与[其他物种名称未给出]和[其他物种名称未给出]相似。‘立秋’品种基因组测序的完成，为挖掘[该物种名称未给出]的优质遗传资源提供了数据支持，并为[该物种名称未给出]的起源和进化特征提供了理论依据。
