银叶向日 (Helianthus argophyllus) 和其跨物种杂交的线粒基因组研究
Maksim S Makarenko1, Kirill V Azarin2, Vera A Gavrilova3
1The Laboratory of Plant Genomics, The Institute for Information Transmission Problems, 127051 Moscow, Russia.
Current issues in molecular biology
|June 27, 2023
概括
太阳花杂交是常见的. 这项研究分析了Helianthus argophyllus的线粒体DNA及其与Helianthus annuus的混合物,没有发现混合物中的重大重组.
科学领域:
- 植物遗传学 植物遗传学
- 线粒体基因组学的基因组学
- 跨种类杂交化 跨种类杂交化
背景情况:
- 太阳花 (Helianthus annuus) 中经常发生跨物种杂交,影响野生种群和繁殖.
- 黑兰斯 (Helianthus argophyllus) 是一种与H. annuus.杂交的常见物种.
研究的目的:
- 分析H. argophyllus中线粒体DNA (mtDNA) 的结构和功能组织.
- 为了研究H. annuus和H. argophyllus之间的跨物种混合物的mtDNA.
- 了解杂交对日mtDNA组织的影响.
主要方法:
- 对H. argophyllus的完整线粒体基因组进行测序和分析.
- 将H. argophyllus mtDNA与栽培的向日的线粒基因组进行比较.
- 在H. argophyllus线粒体编码序列中的RNA编辑部位预测.
- 来自H. annuus × H. argophyllus杂交的mtDNA的分析.
主要成果:
- H. argophyllus的完整线粒基因组为300,843个基因组,并且与培养的向日mtDNA有组织相似之处.
- H. argophyllus mtDNA 含有单核酸多态 (SNP),是野生向日的特征.
- 在H. argophyllus线粒体编码序列中预测了484个RNA编辑部位.
- 混合体的线粒基因组与其母体H. annuus系完全相同,缺乏预期的重排.
结论:
- 在结构上,H. argophyllus的线粒基因组与栽培的向日相似,但具有独特的野生向日SNP.
- 尽管人们期望再组合诱导的重组,但混合体的mtDNA保持不变.
- 核-细胞质相互作用通路的保存可能阻止了混合体中的mtDNA重组.
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