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解析二倍体野生甘蔗近缘种（Hance）Bor的基因组

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

作者信息

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

机构信息

Guangxi Key Laboratory of Sugarcane Genetic Improvement, Ministry of Agriculture and Rural Affairs, Sugarcane Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China.

Guangxi South Subtropical Agricultural Science Research Institute, Guangxi Academy of Agricultural Sciences, Chongzuo 532415, China.

出版信息

Int J Mol Sci. 2025 Jun 26;26(13):6124. doi: 10.3390/ijms26136124.

DOI:10.3390/ijms26136124
PMID:40649902
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12249692/
Abstract

(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 (Hance) Bor GXN1, a diploid species with a chromosomal count of 2 = 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 (Hance) Bor, encouraging future studies on gene function, genome evolution, and genetic improvement of sugarcane.

摘要

（汉氏）斑茅是甘蔗的近缘种，具有抗旱、粗壮、早熟和抗病等特性。在本研究中，我们报道了（汉氏）斑茅GXN1的首个基因组组装结果，这是一个染色体数为2n = 30的二倍体物种。我们将基因组组装成15条假染色体，N50为128.80兆碱基对，通过基准通用单拷贝直系同源基因（BUSCO）评估达到了较高的完整性水平（99.0%）。基因组大小约为1.8吉字节。我们的分析确定了相当比例的重复序列，主要是长末端重复序列（LTR），占基因组的69.12%。总共预测并注释了70,680个蛋白质编码基因，重点关注与抗旱相关的基因。干旱胁迫下的转录组分析揭示了参与植物生理节律和激素信号转导的关键基因家族，包括水通道蛋白、晚期胚胎发生丰富蛋白和热休克蛋白。这项研究揭示了二倍体野生甘蔗近缘种（汉氏）斑茅的基因组，为未来甘蔗基因功能、基因组进化和遗传改良的研究提供了参考。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8db/12249692/31da14166855/ijms-26-06124-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8db/12249692/f91d16ea63cd/ijms-26-06124-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8db/12249692/e79deebf34f9/ijms-26-06124-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8db/12249692/d6f0c7bb7307/ijms-26-06124-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8db/12249692/c838e4c2f296/ijms-26-06124-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8db/12249692/cb7eb7a03bd7/ijms-26-06124-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8db/12249692/31da14166855/ijms-26-06124-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8db/12249692/f91d16ea63cd/ijms-26-06124-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8db/12249692/e79deebf34f9/ijms-26-06124-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8db/12249692/d6f0c7bb7307/ijms-26-06124-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8db/12249692/c838e4c2f296/ijms-26-06124-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8db/12249692/cb7eb7a03bd7/ijms-26-06124-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c8db/12249692/31da14166855/ijms-26-06124-g006.jpg

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