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塑性QTLs特别有助于玉米中的基因型 × 水量可用性相互作用

Yacine Djabali^1,2,3, Renaud Rincent³, Marie-Laure Martin^4,5,6

¹Université Paris-Saclay, CNRS, INRAE, Université Evry, Institute of Plant Sciences Paris-Saclay (IPS2), 91190, Gif-sur-Yvette, France.

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik

|October 19, 2023

概括

鉴定玉米对干旱耐受性的遗传标志物至关重要. 这项研究揭示了可塑性定量特征位点 (pQTLs) 是理解基因型x水供应相互作用的关键,改善干旱抵御策略.

科学领域:

植物遗传学植物遗传学
农业学是一种农业学.
干旱压力研究研究

背景情况:

由于干旱造成的玉米产量损失是一个越来越令人担忧的问题.
识别干旱耐受性的遗传标记对于繁殖至关重要.
干旱反应的遗传基础是复杂的.

研究的目的:

研究玉米干旱反应的遗传基础.
确定与干旱耐受性相关的定量特征位置 (QTL) 和可塑性QTL (pQTL).
评估表型可塑性在玉米对水的可用性反应中的作用.

主要方法:

在254种玉米杂交品种上进行多试验全基因组关联研究 (GWAS).
在水供应良好和缺水条件下收集的表型数据.
对六种生态生理学特征的表型可塑性指数的分析.

主要成果:

确定了102个QTL和40个pQTL,许多是新鲜的.
pQTLs识别了传统QTLs无法找到的独特遗传区域.
对于大多数特征,pQTLs通过水的可用性相互作用解释了基因型变异的60-100%.

结论:

现型可塑性对于理解玉米干旱反应至关重要.
pQTLs特别参与基因型x水的可用性相互作用.
结合的QTL和pQTL解释了超过75%的相互作用变异,揭示了干旱耐受性的新遗传区域.

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