硬小麦的基因组区域与水生产率有关
Meryem Zaïm1,2, Miguel Sanchez-Garcia2, Bouchra Belkadi1
1Laboratory of Microbiology and Molecular Biology, Faculty of Sciences, University Mohammed V in Rabat, Morocco.
Journal of experimental botany
|September 13, 2023
概括
研究人员在 durum wheat 中确定了提高水生产力的关键遗传因素. 这些发现对于稳定地中海地区的谷物产量至关重要,这些地区因气候变化而面临越来越多的水分压力.
科学领域:
- 农业科学 农业科学
- 植物遗传学 植物遗传学
- 气候适应 气候适应
背景情况:
- 坚硬小麦是地中海的主要粮食,主要是雨,容易受到水分压力.
- 在气候变化下,提高水生产率 (每单位水的谷物产量) 对于稳定的 durum小麦生产至关重要.
- 识别对水生产力的遗传控制对于作物改善至关重要.
研究的目的:
- 为了确定与强硬小麦水效率提高相关的遗传局部.
- 为了验证这些位点在水分压力下对谷物产量的贡献.
- 开发用于标记器辅助选择的分子工具,以改进 durum小麦品种.
主要方法:
- 全基因组关联研究 (GWAS) 在18个地中海环境中的384个 durum wheat 加入的多样化小组上.
- 在不同的湿度条件下对水的生产率进行表型评估.
- 在独立面板上使用竞争性等位基特定PCR (KASP) 标记器验证显著基位.
主要成果:
- 六个位置被GWAS确定为水生产率变化的主要贡献者.
- 在三个位点 (染色体1B,2A和7B) 的正等位基因赋予了平均水生产率增长的+2.2 kg ha-1 mm-1.
- 对于这三个位点的KASP标记器预测了高达10%的谷物产量变化,精英线的准确性为60%.
结论:
- 已经确定并验证了控制 durum wheat 的水生产率的三个主要位置.
- 这些位点为标记器辅助的选择和繁殖计划提供了宝贵的资源.
- 已识别的遗传因素可以用于分子金字塔,以提高 durum wheat 对干旱压力的抵抗力.
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