当地人群之间的病毒性差异Puccinia striiformis f. sp. 在中国西南的"三石"
Fang Yang1,2, Yunjing Wang1, Zhiying Ji1
1MoA Key Laboratory for Integrated Management of Pest on Crops in Southwest China/Institute of Plant Protection, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China.
Plants (Basel, Switzerland)
|October 26, 2024
概括
在小麦条纹生病原体 (Puccinia striiformis f. sp. 在中国西南地区的毒性各不相同. 病原体种群表现出减少的多样性和独特的毒性特征,影响小麦种植管理.
科学领域:
- 植物病理学 植物病理学
- 农业科学 农业科学
- 遗传学 是一个遗传学.
背景情况:
- 小麦条纹生,是由Puccinia striiformis f. sp. 引起的 三 (Pst),对中国西南地区的小麦产量产生了重大影响.
- 该地区小麦种植量的下降部分归因于这种疾病的破坏性影响.
研究的目的:
- 分析中国西南地区的菌种群的毒性和遗传多样性.
- 评估不同疾病苗圃地点的小麦线对Pst的耐药性.
- 为了告知小麦条纹的疾病管理策略.
主要方法:
- 从贵州,云南和四川 (2020-2021) 收集了196个Pst分离物.
- 使用中国小麦差异基因型评估毒性和种族.
- 在宁南和江病苗圃中评估了102个小麦线的耐药性 (2021年).
主要成果:
- Pst分离物主要属于病原组混合体46 (贵州,云南) 和G-22 (四川盆地西部).
- 赛车CYR32在Hybrid 46中很常见,而CYR34则在G-22组中占据主导地位.
- 从贵州/云南到四川,PST种群的多样性指数呈下降趋势.
- 西部四川盆地种群和云南,贵州和梁山种群之间观察到显著的毒性差异.
- 与江病苗圃相比,在宁南发现了较高的Pst毒性.
结论:
- 中国西南地区表现出显著的Pst毒性多样性,特别是在四川盆地.
- 在梁山县和云南-贵州高原之间,基因交换似乎更频繁.
- 了解区域性Pst毒性对于有效的小麦条纹生管理至关重要.
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