Unveiling the Genome of the Diploid Wild Sugarcane Relative Narenga porphyrocoma (Hance) Bor

文献类型： 外文期刊

第一作者： Li, Haibi

作者： Li, Haibi;Gui, Yiyun;Wei, Jinju;Zhu, Kai;Zhou, Hui;Zhang, Ronghua;Huang, Dongliang;Huang, Sijie;Li, Shuangcai;Li, Yangrui;Liu, Xihui;Li, Haibi;Zhang, Jisen

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关键词： Narenga porphyrocoma (Hance) Bor; genome assembly; drought resistance; gene annotation; sugarcane breeding

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：4.9； 五年影响因子：5.7 ）

ISSN： 1661-6596

年卷期： 2025 年 26 卷 13 期

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收录情况： SCI

摘要： Narenga porphyrocoma (Hance) Bor is a close relative of sugarcane, with traits such as drought resistance, robustness, early maturity, and disease resistance. In this study, we report the first genome assembly of N. porphyrocoma (Hance) Bor GXN1, a diploid species with a chromosomal count of 2n = 30. We assembled the genome into 15 pseudochromosomes with an N50 of 128.80 Mp, achieving a high level of completeness (99.0%) using benchmarking universal single-copy orthologs (BUSCO) assessment. The genome was approximately 1.8 Gb. Our analysis identified a substantial proportion of repetitive sequences, primarily long terminal repeats (LTRs), contributing to 69.12% of the genome. In total, 70,680 protein-coding genes were predicted and annotated, focusing on genes related to drought resistance. Transcriptome analysis under drought stress revealed the key gene families involved in plant physiological rhythms and hormone signal transduction, including aquaporins, late embryogenesis abundant proteins, and heat shock proteins. This research reveals the genome of the diploid wild sugarcane relative N. porphyrocoma (Hance) Bor, encouraging future studies on gene function, genome evolution, and genetic improvement of sugarcane.

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