在白足老鼠 (Peromyscus Leucopus) 的范围扩张中遗传和表观遗传多样性的模式
T L Rubi1, J R do Prado2, L L Knowles3
1Department of Psychology, University of Michigan, Ann Arbor, MI, USA.
Integrative organismal biology (Oxford, England)
|November 9, 2023
概括
表观遗传多样性可能并不总是弥补物种范围扩张期间的低遗传多样性. 这项对白足小鼠的研究发现对表观遗传补偿的支持有限,这表明复杂的扩张历史影响了适应.
科学领域:
- 进化生物学 进化生物学
- 生态生态学 生态生态学
- 遗传学 遗传学 是一个
背景情况:
- 范围的扩大给适应新环境的人口带来了挑战.
- 表观遗传多样性被假设通过提供非遗传变异来帮助适应,特别是当遗传多样性较低时.
- 这种表观遗传补偿假设对于理解扩张期间的人口持久性至关重要.
研究的目的:
- 研究白足老鼠种群在范围扩张梯度上的遗传和表观遗传多样性之间的关系.
- 为了测试表观遗传多样性补偿扩张前线减少遗传多样性的假设.
- 了解表观遗传变异在适应新环境中的作用.
主要方法:
- 在怀疑的范围扩张梯度沿线采样白足老鼠 (Peromyscus leucopus) 种群.
- 分析这些种群中遗传和表观遗传多样性的空间分布.
- 将范围边缘的种群与已建立地区的种群之间的多样性指标进行比较.
主要成果:
- 对表观遗传补偿假设的支持是混合的.
- 与其他扩张种群相比,表观遗传多样性在所谓的范围边缘没有升高.
- 范围边缘增加的遗传多样性,可能来自多个祖先来源,可能会抵消预期的扩张效应.
结论:
- 密歇根州白足小鼠复杂的扩张历史影响了遗传和表观遗传多样性之间的相互作用.
- 表观遗传多样性可能无法普遍补偿在范围边缘减少的遗传多样性.
- 需要对单系扩张进行进一步的研究,以确认一般趋势.
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