假定的真空处理酶基因TaVPE3cB是小麦茎厚度的候选基因
Qier Liu1,2, Yun Zhao1,3, Shanjida Rahman1
1Centre for Crop and Food Innovation, Food Futures Institute and College of Science, Health, Engineering and Education, Murdoch University, Perth, WA, 6150, Australia.
概括
研究人员确定了真空处理酶基因TaVPE3cB作为小麦厚度的关键因素. 这一发现有助于开发具有更好的茎强度的小麦品种,以获得更好的作物产量.
科学领域:
- 植物遗传学 植物遗传学
- 农业科学 农业科学
- 分子生物学分子生物学
背景情况:
- 小麦厚 (PT) 对茎的机械强度至关重要,特别是在支上层植物结构的基底内部节点.
- 此前,在特定的小麦交叉 (Westonia × Kauz) 中的染色体3BL上已经确定了PT的定量特征位置 (QTL).
研究的目的:
- 确定候选基因并开发与3BL QTL区域内的小麦厚相关的单核酸多态 (SNP) 标记物.
- 选差异表达基因 (DEGs) 并分析基因中的基多态性在已识别的QTL间隔内.
主要方法:
- 大量分离RNA测序 (BSR-seq) 用于识别DEG和高概率SNP.
- 使用定量实时PCR (qRT-PCR) 和测序来确认与PT的基因关联.
- 对高和低PT小麦样本的mRNA序列进行了基多态性分析.
主要成果:
- 在3BL QTL间隔内发现了16个DEG.
- 在8个基因中发现了24个高概率SNP,其中6个基因被证实与PT相关.
- 真空处理酶基因TaVPE3cB被确定为澳大利亚小麦 ("西欧") 中PT的强有力的候选基因.
结论:
- 基因TaVPE3cB是小麦厚的候选者,并且开发了一种强大的SNP标记物,用于其在育种计划中的入侵.
- 其他DEG也可能在皮发育和细胞编程死亡 (PCD) 中发挥作用.
- 提出了一种五层次的层次调节机制,用于小麦的茎骨PCD.
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