Comparison of pollen gene flow among four European beech (Fagus sylvatica L.) populations characterized by different management regimes

The study of dispersal capability of a species can provide essential information for the management and conservation of its genetic variability. Comparison of gene flow rates among populations characterized by different management and evolutionary histories allows one to decipher the role of factors such as isolation and tree density on gene movements. We used two paternity analysis approaches and different strategies to handle possible presence of genotyping errors to obtain robust estimates of pollen flow in four beech (Fagus sylvatica L.) populations from Austria and France. In each country one of the two plots is located in an unmanaged forest, the other plots are managed with a shelterwood system and inside a colonization area (in Austria and France, respectively). The two paternity analysis approaches provided almost identical estimates of gene flow. We found high pollen immigration (~75% of pollen from outside), with the exception of the plot from a highly isolated forest remnant...

物种扩散能力的研究可为其遗传变异性的管理与保护提供关键信息。对比具有不同管理方式与进化历史的种群间基因流速率，有助于解析隔离、树木密度等因素在基因移动中的作用。我们采用两种亲子鉴定分析方法及不同策略处理潜在的基因分型错误，以获取奥地利与法国境内四个欧洲山毛榉（Fagus sylvatica L.）种群花粉流的可靠估计值。两国各有一块样地位于未受管理的森林中，另一块样地则分别位于采用渐伐系统的区域（奥地利）与拓殖区（法国）。两种亲子鉴定分析方法得出的基因流估计值几乎一致。我们发现花粉迁入率较高（约75%的花粉来自外部），但高度隔离的森林残遗地样地除外……