THE COEVOLUTIONARY DYNAMICS OF ANTAGONISTIC INTERACTIONS MEDIATED BY QUANTITATIVE TRAITS WITH EVOLVING VARIANCES
THE COEVOLUTIONARY DYNAMICS OF ANTAGONISTIC INTERACTIONS MEDIATED BY QUANTITATIVE TRAITS WITH EVOLVING VARIANCES
复制标题
由具有进化方差的数量特征介导的对抗相互作用的共同进化动力学
DOI：
10.1111/j.0014-3820.2005.tb00918.x
复制
发表时间：
2005
期刊：
影响因子：
4.8
通讯作者：
D. Browning
中科院分区：
文献类型：
--
作者：
S. Nuismer;M. Doebeli;D. Browning
摘要 数量性状经常介导捕食者与猎物或寄生虫与宿主之间的共同进化相互作用。先前理解和预测这些相互作用的共同进化动力学的努力通常假设遗传变异是固定的或完全不存在。我们开发了一种基因明确的共同进化模型，通过允许遗传变异本身进化来弥合这些方法之间的差距。该模型的分析表明，遗传方差的进化对协同进化的动力学和结果具有重要影响。特别重要的是，我们证明，在没有稳定选择的情况下，可以出现共同进化周期，而这种结果在以前由数量性状介导的共同进化模型中是不可能出现的。共同进化周期是否进化取决于选择的强度、基因座的数量以及每个相互作用物种的突变率。我们的结果还对每个物种连锁不平衡的预期迹象和程度产生了新的预测。
Abstract Quantitative traits frequently mediate coevolutionary interactions between predator and prey or parasite and host. Previous efforts to understand and predict the coevolutionary dynamics of these interactions have generally assumed that standing genetic variation is fixed or absent altogether. We develop a genetically explicit model of coevolution that bridges the gap between these approaches by allowing genetic variation itself to evolve. Analysis of this model shows that the evolution of genetic variance has important consequences for the dynamics and outcome of coevolution. Of particular importance is our demonstration that coevolutionary cycles can emerge in the absence of stabilizing selection, an outcome not possible in previous models of coevolution mediated by quantitative traits. Whether coevolutionary cycles evolve depends upon the strength of selection, the number of loci, and the rate of mutation in each of the interacting species. Our results also generate novel predictions for the expected sign and magnitude of linkage disequilibria in each species.