在草的植物性繁殖过程中对体质突变和DNA甲基化变化的全球表征
Shaoqiang Hu1, Xiangguo Zeng2, Yuguo Liu1,3
1National Key Laboratory for Germplasm Innovation and Utilization of Horticultural Crops, Huazhong Agricultural University, Wuhan 430070, China.
Genome research
|October 15, 2024
概括
草体质突变随着荷尔蒙水平和培养时间的增加而增加. 组织培养还会改变DNA甲基化,影响再生植物的遗传性.
科学领域:
- 基因组学就是基因组学.
- 植物科学 植物科学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 身体突变在植物组织培养和植物传播过程中积累.
- 了解这些突变对于园艺作物改进至关重要.
- 草体质突变的特征在很大程度上仍未得到阐明.
研究的目的:
- 在再生的林地草植物中系统地表征遗传和表观遗传变异.
- 评估同一种草品种不同个体的体质突变.
- 在核酸分辨率下提供对体突变的准确,全基因组评估.
主要方法:
- 从组织培养中获得的再生林地草的全基因组测序.
- 在不同的激素水平和培养时间下对体质突变的分析.
- 12个培养的草个体的全基因组测序"Beni hoppe"品种.
- "Beni hoppe"的哈普洛型解析基因组组合.
主要成果:
- 单核酸变异的突变频率随着激素水平的提高或培养时间的延长而显著增加.
- 在再生植物中观察到CG甲基化的稳定降低 (0.71%-8.03%).
- 低CG差异甲基化区域 (DMRs) 在性繁殖后表现出更高的遗传性.
- 在"Beni hoppe"个体的亚基因组中发现了突变频率 (4731-6005个突变) 的显著变化.
结论:
- 组织培养条件显著影响草体质突变率和表观遗传特征.
- 身体突变和表观遗传变化对繁殖植物的遗传性和特征稳定性有影响.
- 这项研究提供了一个全面的基因组和表观遗传景观的体质变异在草.
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