经常性的杂交和基因流动塑造了挪威和西伯利亚杉的进化历史,跨越了多个冰川周期
Qiujie Zhou1,2, Piyal Karunarathne1,2,3, Lili Andersson-Li4
1Plant Ecology and Evolution, Department of Ecology and Genetics, Uppsala University, Uppsala, Sweden.
Molecular ecology
|August 16, 2024
概括
在冰川周期期间,Picea abies和Picea obovata之间的杂交形成了它们的遗传结构. 这种古老的基因流,受难民的影响,是了解北极森林人口历史的关键.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 遗传学 遗传学 是一个
背景情况:
- 四季气候波动导致树种收缩和扩张.
- 这导致了由基因流和局部适应影响的复杂遗传结构.
- 杂交在塑造这些遗传结构中的作用需要研究.
研究的目的:
- 调查杂交对Picea abies和Picea obovata种群遗传结构的影响.
- 了解欧亚北极森林中杂交,基因流动和适应之间的历史相互作用.
主要方法:
- 在Picea abies和Picea obovata的分布范围内的542个个体的有针对性的重新排序.
- 分析了大约480K个核SNP和87个叶绿体SNP.
- 调查人口遗传结构,基因流动和杂交模式.
主要成果:
- 尽管存在广泛的基因流和隔离距离,但仍出现了独特的遗传集群.
- 混合区内的两个神秘的避难所对于塑造物种分布至关重要.
- 在普莱斯托纪期间,杂交发生了多次,与度依赖的内进.
结论:
- 杂交促进了物种在冰川周期期间适应分布变化.
- 考虑物种复合体,而不是孤立的实体,对于理解人口史至关重要.
- 这项研究强调了杂交在北极森林进化中的动态作用.
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