Genetic diversity of the endemic Canary Island pine tree, Pinus canariensis (Ph.D. thesis)

The Canary Island pine, Pinus canariensis, is an endemic tree that forms one of the main forest ecosystems within the archipelago, and whose distribution has been reduced in the last five centuries by clear cutting for the extraction of timber and tar. It was in the XXth century that exploitation declined and reforestation programs were brought forward for the restoration of an ecosystem that harbours a number of endangered endemic species of plants and animals. In addition to reforestation efforts, an understanding of population genetic processes is also necessary for the successful conservation management of the Canarian pine forest, particularly in light of gathering evidence for local adaptation. In this thesis historical and contemporary gene flow within P. canariensis was studied with nuclear and chloroplast microsatellite markers. High immigration rates (0.68–0.75) were estimated as expected for an outcrossing wind-pollinated tree. Nevertheless, significant population differentia...加那利松（Pinus canariensis）是一种特有树种，构成了加那利群岛主要森林生态系统之一。在过去五个世纪中，因皆伐以提取木材与焦油的活动，其分布范围大幅缩减。直至20世纪，采伐活动逐渐减少，同时启动了再造林计划，以恢复这一孕育了诸多濒危特有动植物物种的生态系统。除再造林修复工作外，要成功开展加那利松林的保护管理，还需深入理解种群遗传过程，尤其是在当地适应性相关研究证据不断涌现的背景下。本研究利用核微卫星标记（nuclear microsatellite markers）与叶绿体微卫星标记（chloroplast microsatellite markers），对加那利松的历史及当代基因流展开了探究。研究估算得到较高的基因流迁移率（0.68–0.75），这与异交风媒树种的理论预期相符。然而，显著的种群分化……