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Local adaptation and gene flow in Empetrum hermaphroditum, a keystone species of boreal-arctic ecosystems, along an altitudinal stress gradient

Empetrum hermaphroditum（北北极生态系统的关键物种）沿海拔应力梯度的局部适应和基因流

基本信息

批准号：
208230283
负责人：
Professor Dr. Rolf Lutz Eckstein
金额：
--
依托单位：
Institut für Landschaftsökologie und Ressourcenmanagement
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2012
资助国家：
德国
起止时间：
2011-12-31 至 2017-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/208230283?language=en
关键词：
Local adaptation gene flow Empetrum

项目摘要

Patterns and processes within the biosphere are currently under a number of pressures from global change. To understand and predict the potential response of plant species to these rapidly changing conditions it is necessary to analyse factors controlling adaptation, distribution and abundance. However, there is a lack of empirical studies concerning the influence of interactions between divergent selection and gene flow on local adaptation, especially for species in large continuous populations. In arctic areas, snow cover represents a complex but very strong selection gradient with significant effects on the growth, phenology and reproduction of plants. The research project will address the effects of selection, gene flow and genetic drift on local adaptation and genetic structure of Empetrum hermaphroditum Hagerup, an important driver of boreal and arctic ecosystems. The main aim will be to understand how selection and gene flow in this wind-pollinated plant affect its adaptation to habitat types with deep and shallow snow cover in continuous populations. To this end, we will (I) study local adaptation in habitats differing in snow cover, (II) compare the phenology of flowering and the shoot growth of the species at different points along altitudinal snow cover gradients, and analyse (III) the genetic structure and (IV) the clonal structure of the species.

生物圈内的模式和过程目前正受到全球变化的一些压力。为了了解和预测植物物种对这些快速变化的条件的潜在反应，有必要分析控制适应、分布和丰度的因素。然而，关于发散选择和基因流之间的相互作用对局部适应的影响，特别是对于大连续种群中的物种，缺乏实证研究。在北极地区，积雪代表着一种复杂但非常强烈的选择梯度，对植物的生长、物候和繁殖有重大影响。这项研究项目将探讨选择、基因流动和遗传漂移对北方和北极生态系统的重要驱动力--雌雄异体飞虱的当地适应和遗传结构的影响。主要目的是了解这种风媒植物的选择和基因流动如何影响其对连续种群中积雪较深和较浅的栖息地类型的适应。为此，我们将(I)研究不同雪盖生境的局部适应性，(Ii)比较物种在沿海拔雪盖梯度的不同点的开花物候和新梢生长，并分析(Iii)物种的遗传结构和(Iv)物种的克隆结构。