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arXiv 2012.02831q-bio.PE
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随机过程与宿主-寄生虫协同进化:协同进化动力学与DNA多态性数据的联系

Stochastic processes and host-parasite coevolution: linking coevolutionary dynamics and DNA polymorphism data

Wolfgang Stephan, Aurélien Tellier

摘要:

种间协同进化,特别是宿主-寄生物间的拮抗性协同进化,是形成物种多样性〈动〉性<动>的主要过程。在本文中,我们调查的作用,各种随机过程的影响结果的确定性共同进化模型。具体而言,我们评估1)遗传漂变和突变对相互作用位点多态性维持的影响,以及2)由于共同人口统计学群体规模变化而导致的两个共同进化物种基因组中中性等位基因频率的变化。我们发现,遗传漂变减少的可能性,观察经典的平衡选择签名,并为最现实的价值观的共同进化参数,平衡选择签名不能被视为在主机位点。此外,我们发现,与经典的预期相反,寄生虫种群规模的快速变化,由于生态evo反馈可以跟踪等位基因位点频谱测量在几个时间点。然而,宿主种群规模的变化不太明显,因此无法观察到。最后,我们还回顾了几个未充分研究的随机过程中发生的宿主-寄生虫的共同进化,这是重要的预测维护多态性的基础位点和全基因组的宿主和寄生虫种群的核苷酸多样性。

英文摘要:

Between-species coevolution, and in particular antagonistic host-parasite coevolution, is a major process shaping within-species diversity. In this paper we investigate the role of various stochastic processes affecting the outcome of the deterministic coevolutionary models. Specifically, we assess 1) the impact of genetic drift and mutation on the maintenance of polymorphism at the interacting loci, and 2) the change in neutral allele frequencies across the genome of both coevolving species due to co-demographic population size changes. We find that genetic drift decreases the likelihood to observe classic balancing selection signatures, and that for most realistic values of the coevolutionary parameters, balancing selection signatures cannot be seen at the host loci. Further, we reveal that contrary to classic expectations, fast changes in parasite population size due to eco-evo feedbacks can be tracked by the allelic site-frequency spectrum measured at several time points. Changes in host population size are, however, less pronounced and thus not observable. Finally, we also review several understudied stochastic processes occurring in host-parasite coevolution which are of importance to predict maintenance of polymorphism at the underlying loci and the genome-wide nucleotide diversity of host and parasite populations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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