category
bioRxiv
date
Feb 24, 2026
slug
status
Published
summary
创新性地利用T2T泛基因组和LGEMP引擎解析结构变异机制,发现3.3kb插入事件驱动 indica 特异性NLR免疫受体进化,填补水稻抗病毒基因数据库空白,并提供分子育种标记。
tags
测序技术
蛋白质进化
type
Post

📄 原文题目

T2T Pangenome Reveals a 3.3kb Structural Variation Driving the De Novo Evolution of a Subspecies-Specific NLR Gene in Rice

🔗 原文链接

💡 AI 核心解读

创新性地利用T2T泛基因组和LGEMP引擎解析结构变异机制,发现3.3kb插入事件驱动 indica 特异性NLR免疫受体进化,填补水稻抗病毒基因数据库空白,并提供分子育种标记。

📝 英文原版摘要

Background: The genomic region spanning 1.1-1.3 Mb on chromosome 6 in rice is a known structural variation (SV) hotspot associated with resistance to Rice Black-Streaked Dwarf Virus (RBSDV). However, the precise molecular mechanisms underlying this resistance have remained elusive, largely due to the limitations of the japonica-based reference genome, which lacks the critical causative variants. Methods: Utilizing a neuro-symbolic-driven analysis of T2T pangenome datasets and the LGEMP engine, we performed a high-resolution comparative genomic study between indica (9311) and japonica (Nipponbare) across this high-diversity locus. Results: We identified a 3.3 kb large-scale insertion uniquely present in the 9311 genome at the 1.21 Mb locus. This SV, likely mediated by transposable elements, exhibits extreme sequence divergence (24% identity) compared to the Nipponbare reference. Importantly, this insertion event facilitated a dramatic functional shift: while the japonica allele encodes a basic DUF590 transporter, the indica allele has evolved into a complete CC-NBS-LRR (NLR) immune receptor. Transcriptomic analysis confirmed the generation of six novel isoforms (T01-T06) derived from the SV sequence. Validation across 16 representative T2T reference genomes demonstrated that this 3.3kb SV is an indica-specific evolutionary "patch," explaining the significant resistance gap between rice subpopulations. Conclusion: Our findings uncover a novel mechanism of gene birth through structural re-organization at genomic hotspots. This study not only fills a critical gap in rice immunity databases but also provides a high-value molecular marker for the molecular breeding of virus-resistant rice varieties.
海洋浮游植物多样性与碳生物量关系的变异性:方法与尺度的差异一种便携式正交复制系统使基因进化接近生物速度极限
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