转录组动力学和基因特异性调节是小麦合成和谷物填充阶段的基础
Xiaojun Wu1,2,3, Xiangdong Chen1,2,3, Ren Wang1,2,3
1Wheat Research Center, Henan Institute of Science and Technology, Xinxiang, 453000, China.
BMC genomics
|September 2, 2025
概括
小麦异质化或混合活力是由不同的基因表达模式驱动的. 非添加物基因效应促进早期生长,而添加物效应则稳定谷物发育,揭示了提高产量的关键调节网络.
科学领域:
- 植物遗传学
- 分子生物学
- 农业科学
背景情况:
- 麦子是全球重要的作物,
- 旗叶的发育对于产量至关重要,但其与异质化的遗传联系尚不清楚.
研究的目的:
- 研究小麦异质化的分子调节网络.
- 了解连接旗叶发育和产量异质化的遗传机制.
主要方法:
- 转录组分析研究基因表达动态.
- 基因特异性表达分析以确定父母的贡献.
- 权重基因共同表达网络分析 (WGCNA) 来识别关键基因和模块.
主要成果:
- 转录重编程发生在合并到谷物填充的过渡过程中,优异的亲代基因往往过度表达.
- 不添加基因效应在合成阶段占主导地位,在谷物填充过程中转向添加效应,创建"双引擎"模型.
- 基因调节变异和 cis × trans 相互作用分别是添加和非添加基因效应的关键驱动因素.
- 鉴定出HSP90. 2-B和AP2/ERF转录因子是产量异位的潜在调节者.
结论:
- 两个模型",双引擎"和"双相调节转变",解释小麦异质,强调特定阶段的基因表达和调节变化.
- 具有附加效应的 cis 调节和具有非附加效应的 trans 调节的优先结合支持了拟议的模型.
- 发育特异性的基因模块 (红色和棕色模块) 和它们的调控网络为多层控制小麦异质提供了洞察力.
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