在Spartina同质杂交品种中出现了核细胞主导地位,并在全聚聚化后持续存在
Alena Kuderová1, Dalibor Húska1,2, Julie Ferreira de Carvalho3
1Laboratory of Molecular Epigenetics, Institute of Biophysics, Czech Academy of Science, v.v.i, Královopolská 135, 612 65, Brno, Czech Republic.
The Plant journal : for cell and molecular biology
|March 5, 2026
概括
核细胞主导,一种对核体DNA的表观遗传沉默,存在于Spartina杂交物和全聚类S. anglica.中. 这是S. alterniflora母体.
科学领域:
- 遗传学 遗传学 是一个
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 植物规格 植物规格
背景情况:
- 斯巴尔蒂纳格里卡是最近的一种全聚类物种化模型.
- 它起源于S. alterniflora和S. maritima.之间的杂交.
- 现存的是同类杂交物S. × townsendii和S. × neyrautii.
研究的目的:
- 在Spartina中调查35SrDNA位点 (核主导) 的表观遗传沉默.
- 分析跨杂交和全聚类血统中核主导的种群水平变化.
- 检查DNA甲基化在rDNA沉默中的作用.
主要方法:
- 分子,基因组和细胞遗传学分析.
- 在S. anglica,S. townsendii和S. neyrautii的种群层面采样.
- 对35S rDNA位点甲基化模式的分析.
主要成果:
- 在所有杂交物和S. anglica. 中观察到S. alterniflora衍生rDNA的强大的核主导地位.
- 在S. alterniflora的rDNA中显示低甲基化;在S. maritima的rDNA中显示高甲基化.
- 在S. anglica中观察到快速的rDNA二倍化,很少有个体失去沉默的位置.
结论:
- 核细胞主导地位在同质杂交物中建立,在S. anglica.中保持.
- 表观遗传过程影响了斯巴尔蒂纳的快速rDNA二分化.
- 在S. anglica中,偶尔会发生核细胞主导的部分放松.
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