Martinez J G, Soler J J, Soler M, Møller A P, Burke T
Departamento de Biología Animal y Ecología, Facultad de Ciencias, Universidad de Granada, E-18071, Granada, Spain.
Department of Animal and Plant Sciences, The University of Sheffield, Sheffield, S10 2TN, United Kingdom.
Evolution. 1999 Feb;53(1):269-278. doi: 10.1111/j.1558-5646.1999.tb05352.x.
The amount of gene flow is an important determinant of population structure and therefore of central importance for understanding coevolutionary processes. We used microsatellite markers to estimate population structure and gene flow rates of the great spotted cuckoo (Clamator glandarius) and its main host in Europe, the magpie (Pica pica), in a number of populations (seven and 15, respectively) across their distribution range in Europe. The genetic analysis shows that there exists a pattern of isolation by distance in both species, although the cuckoo data are only indicative due to a small sample size. Gene flow seems to be extensive between nearby populations, higher for magpies than cuckoos, and especially high for magpie populations within the area of distribution of the great spotted cuckoo. There is no correlation between genetic distances between magpie populations and genetic distances between cuckoo populations. We discuss the implications of extensive gene flow between magpie populations in sympatry with cuckoos for the population dynamics of hosts, in particular for the occurrence of egg rejection behavior in host populations and how the different rates of migration for both species can affect the dynamics of coevolutionary processes.
基因流的数量是种群结构的一个重要决定因素，因此对于理解协同进化过程至关重要。我们使用微卫星标记来估计欧洲分布范围内多个种群（大斑鹃[Clamator glandarius]及其主要宿主喜鹊[Pica pica]分别为7个和15个种群）中大斑鹃和喜鹊的种群结构及基因流速率。遗传分析表明，两个物种均存在距离隔离模式，不过由于大斑鹃样本量较小，其数据仅具有指示性。基因流似乎在相邻种群间广泛存在，喜鹊的基因流高于大斑鹃，在大斑鹃分布区域内的喜鹊种群中尤其高。喜鹊种群之间的遗传距离与大斑鹃种群之间的遗传距离没有相关性。我们讨论了与大斑鹃同域分布的喜鹊种群间广泛基因流对宿主种群动态的影响，特别是对宿主种群中卵拒绝行为出现的影响，以及两个物种不同的迁移速率如何影响协同进化过程的动态。
