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对小麦 (Triticum aestivum L.) 的盐和干旱耐受性特征进行定量特征位置映射

Xiaotong Liu¹, Tao Sun¹, Zihan Zhou¹

¹Yantai Key Laboratory of Crop Molecular Breeding for High Yield, Stress Resistance and Efficient Cultivation in Universities of Shandong, College of Horticulture, Ludong University, Yantai, 264025, China.

BMC plant biology

|July 2, 2025

概括

这项研究确定了小麦盐和干旱耐受性的定量特征位点 (QTLs),使用重组杂交品种种群. 一个稳定的主要QTL,qShl-3B,与InDel标志物相关,帮助培育耐压小麦品种.

科学领域:

植物遗传学和育种.
在作物中的非生物应激耐受性.
小麦 (Triticum aestivum L.) 的基因组学

背景情况:

小麦对非生物压力 (如盐度和干旱) 非常敏感,特别是在发芽期间.
了解压力耐受性的遗传基础对于提高小麦弹性至关重要.

研究的目的:

探索小麦盐和干旱耐受性的遗传结构.
确定与这些应力承受度相关的定量特征位置 (QTL).
开发分子标记物用于培育计划中的标记物辅助选择.

主要方法:

采用了一种由188个基因系的重组杂交系 (RIL) 种群,该种群是由Kenong9204 (KN9204) 和Jing411 (J411) 之间的交叉产生的.
在受控盐 (100 mM NaCl) 和干旱 (10% PEG-6000) 压力条件下的表型评估.
全基因组关联研究 (GWAS) 检测附加和表观QTLs (eQTLs).
开发和验证与重要QTL相关的InDel标记.

主要成果:

在与盐和干旱耐受性相关的八个特征中,确定了52个假定的附加QTL和251个表观QTL (eQTL).
检测到七个稳定的QTL和三个主要QTL,包括qShl-3B,一个稳定的主要QTL解释显著的表型变异.
开发并验证了一种与稳定主要QTLqShl-3B.密切相关的InDel标记物.

结论:

该研究揭示了在小麦染色体中分布的多种添加剂和表观QTLs,有助于盐和干旱耐受性.
确定了稳定和主要的QTLs,特别是qShl-3B,为增强小麦应激弹性提供了宝贵的遗传资源.
开发的InDel标记器为盐和耐旱小麦品种的标记器辅助育种提供了一个实用的工具.

关键词:

综合评价综合评价综合评价耐旱耐受性耐旱耐受性耐旱耐受性在 QTL 映射中使用 QTL 地图.盐的耐受性盐的耐受性小麦小麦小麦小麦的小麦.

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