在珍珠小米参考集合 PMiGAP 中的透气效率变化
Laura Grégoire1, Jana Kholova2,3, Rakesh Srivastava2
1Diversité, Adaptation, Développement des Plantes (DIADE), University of Montpellier, Institut de Recherche pour le Développement (IRD), Montpellier, France.
PloS one
|July 26, 2024
概括
珍珠小米的透气效率 (TE) 显示出显著的基因型变异性,为改善干旱耐受性提供了两倍的范围. 优化TE对于提高在育种计划中的谷物产量至关重要.
科学领域:
- 农业科学 农业科学
- 植物生理学 植物生理学
- 遗传学 遗传学 是一个
背景情况:
- 透气效率 (TE) 对作物生产率至关重要,尤其是在水资源有限的条件下.
- 增加 TE 是提高作物耐旱能力的关键策略.
- 珍珠小米 (Pennisetum glaucum) 是干旱和半干旱地区的重要主食作物.
研究的目的:
- 在一个大而多样化的珍珠小米小组中探索透气效率 (TE) 的基因型变异性.
- 在不同的水条件下评估TE与谷物产量之间的关系.
- 评估农业生态区和水压对TE的影响.
主要方法:
- 在537种珍珠小米基因型 (杂交线,试验杂交杂交和杂交) 中对TE的分析.
- 在水和终端水压力条件下进行了三次 lysimeter 试验 (2012年,2013年,2015年).
- 测量谷物产量及其与 TE 的相关性.
主要成果:
- 在不同的珍珠小米加入中观察到高达TE的两倍变化.
- 平均TE在水应力下略高,在同系和试交杂交杂交之间有所不同.
- 不同农业生态区开发的杂交品中TE的差异较大,来自湿地区的杂交品的价值较高.
- 检测到显著的基因型x环境 (GxE) 相互作用,尽管TE的遗传性很高.
- TE是谷物产量的第二大贡献者,仅次于收获指数.
结论:
- 珍珠小米对 TE 具有显著的基因型变异性,为培育更好的耐旱品种提供了机会.
- TE是谷物产量的重要特征,应纳入珍珠小米育种计划.
- 未来的研究应该专注于了解TE可塑性 (GxE相互作用) 和其遗传基础.
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