Department of Evolutionary Theory, Max Planck Institute for Evolutionary Biology, 24306, Plön, Germany.
Sci Rep. 2021 Sep 9;11(1):17979. doi: 10.1038/s41598-021-97187-6.
The effect of population structure on evolutionary dynamics is a long-lasting research topic in evolutionary ecology and population genetics. Evolutionary graph theory is a popular approach to this problem, where individuals are located on the nodes of a network and can replace each other via the links. We study the effect of complex network structure on the fixation probability, but instead of networks of individuals, we model a network of sub-populations with a probability of migration between them. We ask how the structure of such a meta-population and the rate of migration affect the fixation probability. Many of the known results for networks of individuals carry over to meta-populations, in particular for regular networks or low symmetric migration probabilities. However, when patch sizes differ we find interesting deviations between structured meta-populations and networks of individuals. For example, a two patch structure with unequal population size suppresses selection for low migration probabilities.
人口结构对进化动态的影响是进化生态学和群体遗传学中一个长期存在的研究课题。进化图论是解决这个问题的一种流行方法，其中个体位于网络的节点上，并可以通过链接相互替换。我们研究了复杂网络结构对固定概率的影响，但不是个体网络，而是模拟具有它们之间迁移概率的亚种群网络。我们想问这种元种群的结构和迁移率如何影响固定概率。许多已知的个体网络的结果可以推广到元种群，特别是对于规则网络或低对称迁移概率。然而，当斑块大小不同时，我们发现结构元种群和个体网络之间存在有趣的偏差。例如，具有不等种群大小的两个斑块结构会抑制低迁移概率的选择。
