面包小麦的表型可塑性有助于在热量和干旱压力下提高产量可靠性
Jatinder Singh Sangha1, Weiwei Wang1, Ron Knox1
1Swift Current Research and Development Centre, Agriculture and Agri-Food Canada, Swift Current, Saskatchewan, Canada.
PloS one
|March 10, 2025
概括
养殖小麦的气候适应性是关键. 高粒度碳同位素区分 (Δ13C) 和用水效率 (WUE),具有低的口腔数量,表明在半干旱条件下产量可靠性.
科学领域:
- 农业科学 农业科学
- 植物育种 植物育种
- 适应气候变化 适应气候变化
背景情况:
- 气候变化对小麦生产系统构成重大威胁,影响产量可靠性.
- 开发耐热性和干旱压力的小麦品种对于粮食安全至关重要.
研究的目的:
- 在各种环境条件下评估小麦基因型的表型可塑性和产量可靠性.
- 确定与热和干旱压力耐受性相关的关键生理和形态特征.
- 在半干旱地区指导适应气候变化的小麦的育种工作.
主要方法:
- 在四年内,在三个田间环境 (雨水,灌,热/干) 中评估了18种六倍体小麦基因型.
- 收集有关生理特征 (例如,粒度 Δ13C,用水效率 (WUE),口腔数量),农业学和形态学属性的数据.
- 分析了基因型表现,并确定了与压力下产量可靠性相关的特征.
主要成果:
- 在不同环境中观察到特征和产量的显著变化.
- 高产量的基因型表现出更高的粒度 Δ13C 和 WUE.
- 胃口对水应激的适应性各不相同,高产量线显示压力下胃口数量增加,低产量线显示数量减少.
结论:
- 具有高粒度 Δ13C,WUE 和低口腔数量的基因型在可变的半干旱环境中显示出更高的产量可靠性.
- 口腔可塑性是小麦耐旱性的一个关键适应机制.
- 这些发现为培育适应气候变化的小麦生殖质提供了基础,以获得一致的产量.
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