遗传调节 在双排大麦中侧侧的发展中VRS基因的差异
Liping Shen1,2, Zhiwen Sun1,3, Yangyang Liu1,3
1State Key Laboratory of Forage Breeding-by-Design and Utilisation, Institute of Botany, Chinese Academy of Sciences, Beijing, China.
Plant, cell & environment
|September 11, 2025
概括
了解大麦尖子的发育是提高谷物产量的关键. 这项研究揭示了SIX-ROWED SPIKE基因如何调节侧向尖细胞的生育能力,识别VRS1.
科学领域:
- 植物遗传学和分子生物学
- 植物科学和农业研究.
背景情况:
- 麦子尖有中央和侧面的尖,生育能力在两排和六排品种之间有所不同.
- 已知有五个六行 (VRS1-5) 基因是侧子生育的调节者,但它们的机制尚不清楚.
研究的目的:
- 为了阐明基因机制背后的VRS基因功能在大麦侧面尖头发育.
- 为了研究vrs1-5突变体和野生类型大麦子之间的基因表达差异.
- 确定VRS1的直接下游目标,并了解其监管作用.
主要方法:
- 详细的发展观察两排大麦侧.
- 突变型和野生类型的棘虫的比较转录组分析 (RNA测序).
- 染色体免疫沉测序 (ChIP-seq) 用于识别VRS1的直接标.
主要成果:
- 通过VRS基因调节的下游途径的差异在横向尖细胞发育中被揭示出来.
- VRS1直接调节213个下游基因,包括能量代谢,激素通路和转录因子中的基因.
- VRS1直接与HVMADS13结合,HVMADS13是一种D类基因,影响尖端细胞的生育能力.
- 在六行大麦中,VRS1的C端1bp的缺失破坏了其转录抑制,导致横向尖端子生育能力.
结论:
- 这项研究澄清了VRS基因在大麦侧尖发育和生育中的作用.
- VRS1作为转录抑制剂,其因特定突变 (例如,1bp删除) 而改变的功能导致六行特征.
- 了解这些遗传机制为改善大麦产量和建筑提供了洞察力.
相关概念视频
01:17Gene Regulation During Sporulation
447
Sporulation is a complex developmental process that allows certain Gram-positive bacteria, such as Bacillus subtilis and Clostridium species, to survive extreme environmental conditions. This process is tightly regulated by a series of signaling cascades and transcriptional controls, ensuring the formation of a highly resistant endospore.Sporulation is triggered by unfavorable conditions, such as nutrient depletion, and is governed by a phosphorelay system. One of the sensor kinases, such as...
447
02:24Regulation of Expression Occurs at Multiple Steps
25.7K
Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
25.7K
02:24Regulation of Expression Occurs at Multiple Steps
3.9K
3.9K
01:23Regulation of Expression at Multiple Steps
1.3K
The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the...
1.3K
02:27Trihybrid Crosses
25.3K
Trihybrid Crosses
Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
The F1 generation plants of a trihybrid cross are heterozygous for all three traits and produce eight gametes. Upon self-fertilization, these gametes have an equal...
Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
The F1 generation plants of a trihybrid cross are heterozygous for all three traits and produce eight gametes. Upon self-fertilization, these gametes have an equal...
25.3K
01:18Dihybrid Crosses
80.9K
Overview
80.9K