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在多环境试验中,冬季小麦作物对Stagonospora Nodorum Blotch流行病的性能和稳定性

Vinicius C Garnica¹, Mohammad Nasir Shalizi², Peter S Ojiambo³

¹North Carolina State University at Raleigh, Entomology and Plant Pathology, Raleigh, North Carolina, United States; garnica.vinicius@gmail.com.

|October 1, 2025

概括

基因型与环境相互作用 (GEI) 影响冬季小麦对Stagonospora nodorum blotch.的表现.

科学领域:

植物病理学植物病理学
农业学是一种农业学.
定量遗传学是一个量子遗传学.

背景情况:

冬季小麦对Stagonospora nodorum blotch (SNB) 的定量耐药性取决于基因型对环境的相互作用 (GEI).
在各种环境中,GEI导致品种表现不一致,使品种选择和风险评估模型复杂化,这些模型假定了稳定的品种反应.
了解GEI对于开发强大的疾病管理策略和育种计划至关重要.

研究的目的:

调查GEI对冬季小麦中Stagonospora nodorum斑点流行病的影响.
评估疾病指标,包括严重程度,疾病进展阶梯下的区域,发病率达到50%的时间和明显的疾病增加率.
为特定环境确定稳定和高性能冬季小麦品种.

主要方法:

在18个北卡罗来纳州环境中 (2021-2024) 分析了18种商业软红冬季小麦品种的疾病数据.
采用了各种变异-共变异结构的线性混合模型,选择了最合适的第三顺序因子分析模型.
使用因子分析方法估计B型遗传相关性 (rg),广义遗传性 (Hb^2),整体品种性能 (OP) 和全球稳定性 (RMSD).

主要成果:

大多数环境对显示SEV,rAUDPS和T50的高遗传相关性 (rg),表明不同地点的品种排名一致.
"USG 3230"表现出最高的性能和稳定性,而"TURBO"和"SH7200"被认为是不稳定的.
基于整体性能的培养反应类提供了SNB风险评估敏感性的稳定指标.

结论:

GEI显著影响冬季小麦疾病指标的Stagonospora nodorum斑点.
因子分析建模有效地描述了GEI,并确定了稳定,高性能品种.
从此分析中得出的培养物反应类对于风险评估和育种决策有价值.

关键词:

疾病耐药性疾病耐药性流行病学流行病学

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