早期开花3个基因对中国白菜中生理时钟的温度反应有影响
Shan Wang1, Daling Feng1, Yakun Zheng1
1State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory of Vegetable Germplasm Innovation and Utilization of Hebei, Ministry of Education of China-Hebei Province Joint Innovation Center for Efficient Green Vegetable Industry, Hebei International Joint Research Centre of Vegetable Functional Genomics, Department of Vegetable Breeding, College of Horticulture, Hebei Agricultural University, Baoding 071000, China.
Plant physiology
|November 15, 2024
概括
适应温度的昼夜钟适应温度对于气候适应性至关重要. BrELF3基因对这种蔬菜对热变化的反应起着关键作用,影响其生长和产量.
科学领域:
- 植物生物学 植物生物学
- 循环节律是指循环节律的节奏.
- 适应气候变化 适应气候变化
背景情况:
- 温度是一个关键的环境提示,影响植物的昼夜钟.
- 了解像中国白菜这样的农作物中昼夜节律的热适应对于气候变化弹性和粮食安全至关重要.
- 以前对叶菜中昼夜钟热适应的研究仍然有限.
研究的目的:
- 为了研究白天节律和热适应性在中国白菜 (Brassica rapa ssp. 在不同的温度下. pekinensis) 在不同的温度下.
- 为了确定遗传变异,特别是BrELF3基因,负责中国白菜的温度补偿 (Q10).
- 评估BrELF3等位基因在调解昼夜时钟对热线索反应中的作用.
主要方法:
- 在三个不同的温度下 (14,20和28°C) 种植中国白菜,以研究昼夜节律.
- 全基因组关联研究 (GWAS) 用于绘制与温度补偿相关的遗传位置 (Q10).
- 在F2种群中对BrELF3等位基因 (BrELF3H1和BrELF3H2) 的哈普洛型分析和共同分离分析.
- 在Arabidopsis thaliana elf3-8突变体中进行了转基因补充实验.
主要成果:
- 中国卷心菜的昼夜周期在20°C相比14°C或28°C要短得多.
- 全基因组关联研究确定了与温度补偿 (Q10) 相关的遗传变异.
- BrELF3H1等位基赋予了比BrELF3H2更高的Q10值 (2028°C),表明了不同的热敏感性.
- 在20°C时,BrELF3等位基因的变异影响了昼夜周期,但在28°C时,这种影响减少了.
- 转基因补充证实了BrELF3在热暗示反应中的作用,BrELF3H1显示了更高的Q10.
结论:
- BrELF3基因对于调节日间钟对中国白菜环境温度的反应至关重要.
- 特定的BrELF3等位基因表现出不同的温度补偿,影响昼夜节律.
- 这些发现为培育对极端温度耐受性更强的中国白菜品种提供了基础.
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