布拉西卡拉帕 (Brassica rapa) 中的花C5植物的特征
Ayasha Akter1,2, Tomohiro Kakizaki3, Etsuko Itabashi3
1Graduate School of Agricultural Science, Kobe University, Rokkodai, Nada-ku, Kobe, 657-8501 Japan.
Molecular breeding : new strategies in plant improvement
|July 24, 2023
概括
功能性Brassica rapa BrFLC5等位基因在多种加入中被确定,揭示了一个可以增强蔬菜过早结抵抗的花抑制剂.
科学领域:
- 植物遗传学和分子生物学
- 在 Brassicaceae 中,花期调节.
背景情况:
- 由于多个相似的开花时间基因,Brassica rapa表现出复杂的开花时间控制,与Arabidopsis thaliana不同.
- 开花地点C (FLC) 是一个关键的开花调节器,B. rapa拥有四个FLC对应物.
- BrFLC5以前被认为是伪基因,原因是拼接部位突变,但功能性等位基因存在.
研究的目的:
- 调查Brassica rapa加入中的BrFLC5等位基因的功能状态和流行率.
- 描述BrFLC5作为花抑制剂的作用,并分析其表达模式.
- 探索功能性BrFLC5在开发早产耐螺栓B. rapa品种中的潜力.
主要方法:
- 对310个B. rapa加入的基因型定型,以确定功能性的BrFLC5等位基因.
- 在Arabidopsis thaliana中过度表达BrFLC5,以评估其作为花抑制剂的功能.
- 分析了先前化的植物中的BrFLC5表达水平,并调查了促进区域的变异.
主要成果:
- 在310个B. rapa加入中确定了19个同卵性和81个异卵性假定功能BrFLC5等位基因,卜显示的频率最高.
- 在Arabidopsis中BrFLC5的过度表达证实了其作为花抑制剂的作用.
- 观察到BrFLC5的转录变异,其中一个584-bp促进体插入与一些加入中的更高表达有关.
结论:
- 在B. rapa中存在功能性BrFLC5等位基因,并充当花抑制剂.
- 一个促进物插入可能会影响BrFLC5的表达,可能有助于调节开花时间.
- 利用功能性的BrFLC5可能是开发抗过早螺栓化的B. rapa蔬菜的一种策略.
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