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在春小麦品种PI 660122中,使用小麦15K SNP阵列绘制全基因组范围的QTL映射,以检测条纹抗性

Qiong Yan¹, Guoyun Jia¹, Wenjing Tan¹

¹Wheat Research Institute, School of Life Sciences and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan, China.

Frontiers in plant science

|September 13, 2023

概括

研究人员在小麦品种PI 660122.2.中确定了9个定量特征位点 (QTLs) 对于条纹抗性. 染色体4DS上的一个主要的QTL显著促进了所有阶段的耐药性,有助于未来的疾病控制育种工作.

科学领域:

植物病理学植物病理学
遗传学遗传学是一个
农业学是一种农业学.

背景情况:

条纹生是对小麦生产的重大全球威胁.
开发具有持久耐药性的小麦品种对于疾病管理至关重要.
小麦品种PI 660122具有显著的条纹抗性,但其遗传基础是未知的.

研究的目的:

为了基因剖析小麦系PI 660122.2.的条纹抗性.
识别和绘制与条纹抗性相关的定量特征位点 (QTL).
在小麦育种中发现用于标记器辅助选择的分子标记物.

主要方法:

从PI 660122和迈9023.23之间的交叉中开发了一个复合同血统 (RIL) 种群 (n=239).
在三个现场环境中,RILs被表型为条纹生反应.
用小麦15K单核酸多态 (SNP) 阵列进行基因型鉴定.

主要成果:

在染色体1B,2B,4B,4D,6A,6D和7D上绘制了9个条纹抗的QTL.
七个QTL表现出跨环境的稳定性.
一个主要的QTL,QYrPI660122.swust-4DS,在染色体4DS上解释了显著的表型变异 (10.67%-20.97%) 并被映射到12.15-cM间隔.

结论:

已识别的QTL和链接的SNP标记器为在小麦育种计划中增强条纹生耐药性提供了宝贵的工具.
4DS染色体上的主要QTL是开发耐药小麦品种的关键目标.
具有有利的农学特征的选择性耐药系可以向新品种释放前进.

关键词:

在 QTL 映射中使用 QTL 地图.电阻的阻力可以条纹生条纹生小麦小麦小麦小麦小麦小麦小麦.黄色的生是黄色的生

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