一个kinase-START基因赋予了对小麦条纹生的温度依赖性抵抗力
Daolin Fu1, Cristobal Uauy, Assaf Distelfeld
1Department of Plant Sciences, University of California, Davis, CA 95616, USA.
概括
科学家们确定了Yr36基因,该基因对小麦条纹的抗性至关重要. 这种在高温下有效的基因可以重新引入现代小麦品种,以对抗正在演变的真菌菌株.
科学领域:
- 植物病理学 植物病理学
- 分子遗传学 分子遗传学
- 农作物科学 农作物科学
背景情况:
- 由Puccinia striiformis引起的条纹是一种主要的全球小麦疾病.
- 新兴的病原体种族使许多现有的抗药基因变得无效.
- 在小麦育种中,急需新型抗药源.
研究的目的:
- 为了识别和表征赋予抗条纹的新型基因.
- 了解抵抗Puccinia striiformis的分子基础.
- 探索改善小麦对真菌病原体的抵抗力的新途径.
主要方法:
- 基于地图的克隆被用来隔离抗性基因Yr36.
- 功能验证涉及突变分析和转基因补充.
- 进行了植物遗传学分析,以评估小麦品种中的基因存在.
主要成果:
- 基因Yr36已成功克隆,并被确定为WKS1.1.
- Yr36赋予了宽频抗条纹的性能,特别是在高温 (25-35°C).
- 该基因编码了一种具有酶和START脂质结合域的蛋白质,这对功能至关重要.
结论:
- Yr36代表了一种有价值的遗传资源,可以增强小麦对条纹的抵抗力.
- 该基因存在于野生小麦中,但已在现代品种中消失.
- 重新引入Yr36提供了一个有前途的策略,以提高全球小麦的安全性,以抵御不断变化的病原体.
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