编码MADS盒子的Tunicate1基因通过增加耳朵上方的叶数来积极控制玉米产量
Yan Li1, Jian Wang1, Shuyang Zhong1
1State Key Laboratory of Maize Bio-Breeding; National Maize Improvement Center; Department of Crop Genetics and Breeding; China Agricultural University, 100193, Beijing, China.
Nature communications
|November 12, 2024
概括
研究人员在玉米 (Tunicate1或Tu1) 中发现了一种基因变异,该变异增加了耳朵上方的叶子数量. 这一发现增强了粮食填充的碳水化合物来源,提高了玉米产量,并为作物育种提供了宝贵的见解.
科学领域:
- 植物遗传学 植物遗传学
- 农作物科学 农作物科学
- 玉米育种 玉米育种
背景情况:
- 玉米中耳朵以上的叶子数量对于谷物填充期间的碳水化合物供应至关重要.
- 增加这种叶数是现代玉米育种中一个关键但具有挑战性的目标,以提高产量.
研究的目的:
- 克隆负责影响玉米耳朵上方叶数量的定量特征位点 (QTL) 的基因.
- 研究该基因影响叶子发育和玉米产量的机制.
主要方法:
- 与叶子号相关的定量性质位点 (QTL) 的基因克隆.
- 对Tunicate1 (Tu1) 基因及其上游调控元素的分析.
- 实地试验以评估特定的Tu1基因对谷物产量的影响.
主要成果:
- 导致耳朵上方叶子增加的基因被确定为Tunicate1 (Tu1).
- 在Tu1上游的5个基对插入,源自爆米花陆地品种,增强其转录并增加叶子数量.
- 这种特定的Tu1等位基因导致在定期和密集种植下,产量分别增加了11.4%和9.5%.
结论:
- 图尼卡特1 (Tu1) 基因,特别是来自陆地品种的等位基因,可以显著增加玉米的叶数和谷物产量.
- 玉米陆地品种是改善高产繁殖策略的宝贵遗传资源.
- 了解和利用有利的等位基因,如Tu1插入,可以推进玉米育种工作.
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