来自野生的头对头NLR基因对赋予小麦的条纹抗性
Yanling Hu1,2, Miaomiao Li3, Yuqin Li2
1State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu, China.
Nature genetics
|June 9, 2025
概括
研究人员在野生小麦中发现了TdNLR1和TdNLR2两种关键基因,这些基因对条纹具有抗性. 这一发现有助于在小麦作物中培养持久的抗病能力.
科学领域:
- 植物遗传学 植物遗传学
- 分子生物学分子生物学
- 农作物科学 农作物科学
背景情况:
- 小麦条纹是对全球粮食安全的重大威胁.
- 识别和利用野生亲属的抗病基因是可持续作物保护的关键.
研究的目的:
- 从野生麦小麦中分离和表征新的条纹抗基因.
- 了解植物防御中的配对核酸结合和氨酸丰富的重复 (NLR) 受体的功能和遗传结构.
主要方法:
- 基于地图的克隆和长读测序来识别耐药基因.
- 突变发生,基因沉默和基因转换以验证基因功能.
- 在植物试验中研究蛋白质相互作用和细胞死亡诱导.
主要成果:
- 隔离了两个相邻的,面向对面的NLR基因,TdNLR1和TdNLR2,并发现它们对YrtD121介导的条纹耐性至关重要.
- TdNLR1编码了一个正规的NLR蛋白质,而TdNLR2编码了一个非典型的NLR蛋白质.
- 这两种基因都缺乏集成域,呈现出不寻常的配对NLR架构;TdNLR1的卷轴-卷轴域诱导细胞死亡.
结论:
- 配对的NLR基因TdNLR1和TdNLR2对于野生麦的条纹生抗性至关重要.
- 这项研究阐明了非典型配对NLRs在植物免疫力中的作用,为培育耐药小麦品种提供了新的途径.
- 鉴定出的抗药性基因YrtD121是野生麦的特异性基因,这凸显了探索多样化的遗传资源的重要性.
相关概念视频
01:18Dihybrid Crosses
Overview
02:27Trihybrid Crosses
Trihybrid Crosses
Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
The F1 generation plants of a trihybrid cross are heterozygous for all three traits and produce eight gametes. Upon self-fertilization, these gametes have an equal chance to...
Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
The F1 generation plants of a trihybrid cross are heterozygous for all three traits and produce eight gametes. Upon self-fertilization, these gametes have an equal chance to...