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揭示了Primula vulgaris中范围扩张和交配系统转换的全基因组后果
Emiliano Mora-Carrera1, Rebecca L Stubbs1, Giacomo Potente1
1Department of Systematic and Evolutionary Botany, University of Zurich, Zurich, Switzerland.
Genome biology and evolution
|September 28, 2024
概括
普林虫 (Primula vulgaris) 经历了从高加索地区扩展的范围,并转向自我,减少遗传多样性和改变可转移元素. 这些人口统计过程塑造了它在四季气候振荡中的基因组进化.
科学领域:
- 进化生物学 进化生物学
- 人口遗传学 人口遗传学
- 基因组学就是基因组学.
背景情况:
- 遗传多样性因人口统计学过程而变化,例如范围的变化和交配系统的变化.
- 普林 (Primula vulgaris) 是一种典型的多年草,起源于高加索地区,并以从异构向同构过渡而闻名.
- 之前的假设表明,在四分期冰川退缩后,向西扩张.
研究的目的:
- 为了研究范围的扩大和交配系统的变化如何影响了普林类的基因组多样性在空间和时间上的变化.
- 为了重建Primula vulgaris的人口统计历史.
- 了解四季气候振荡,人口统计过程和植物进化之间的相互作用.
主要方法:
- 利用了来自异型和同型Primula vulgaris个体的全基因组复序数据.
- 使用来自相关物种Primula veris.的高质量参考基因组.
- 使用人口遗传分析重建人口统计历史.
主要成果:
- 证实了大约79,000年前从高加索地区的范围扩张.
- 表明,在英国的冰川后殖民化后,发生了对同居的转变.
- 观察到遗传多样性的减少,链接不平衡的增加,以及与这两种过程相关的净化选择的有效性降低.
- 发现范围的扩大,但不是转移到同质性,影响了可转移元素的基因组内容.
结论:
- 人口历史,包括范围扩张和交配系统过渡,显著塑造了Primula vulgaris的基因组多样性.
- 这些发现支持人口遗传学中关于这些过程影响的理论预测.
- 范围的扩大和交配系统的转变与四季气候振荡相互作用,推动植物进化.
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