Genotypic variation and plasticity in climate-adaptive traits after range expansion and fragmentation of red spruce ( Picea rubens Sarg.)
Genotypic variation and plasticity in climate-adaptive traits after range expansion and fragmentation of red spruce ( Picea rubens Sarg.)
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红云杉（Picea rubens Sarg.）范围扩大和破碎后气候适应性状的基因型变异和可塑性
DOI：
10.1098/rstb.2021.0008
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Keller, Stephen R.
中科院分区：
文献类型：
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作者：
Prakash, Anoob;DeYoung, Sonia;Lachmuth, Susanne;Adams, Jacquelyne L.;Johnsen, Kurt;Butnor, John R.;Nelson, David M.;Fitzpatrick, Matthew C.;Keller, Stephen R.
随着气候变暖，预计许多物种的活动范围限制会发生变化。然而，气候变化的快速步伐将挑战森林树木等长寿固着生物的自然扩散能力。因此，种群的适应性反应将取决于气候响应性状的遗传变异和可塑性水平，由于扩张历史和当前的选择模式，这些性状可能会在整个范围内变化。在这里，我们研究水平的遗传和可塑性变化的物候和生长性状的红云杉（云杉）的人口，从范围的核心高度分散的后缘。我们测量了5000多个后代样本从三个遗传不同的地区（核心，边缘和边缘）生长在三个共同的花园复制沿着纬度梯度。物候和生长的遗传变异表现出低到中等的遗传力和地区间的分化，这表明一些潜在的选择。物候特征具有高度的可塑性，但这种可塑性一般是中性或适应不良的影响，在温暖的气候下，揭示了潜在的责任。这些结果表明，未来的气候适应将取决于红云杉的遗传变异的区域可用性，并提供了一个资源的设计和管理的辅助gene flow.This文章的主题问题的一部分“物种”范围面对不断变化的环境（第二部分）。
Shifting range limits are predicted for many species as the climate warms. However, the rapid pace of climate change will challenge the natural dispersal capacity of long-lived, sessile organisms such as forest trees. Adaptive responses of populations will, therefore, depend on levels of genetic variation and plasticity for climate-responsive traits, which likely vary across the range due to expansion history and current patterns of selection. Here, we study levels of genetic and plastic variation for phenology and growth traits in populations of red spruce (Picea rubens), from the range core to the highly fragmented trailing edge. We measured more than 5000 offspring sampled from three genetically distinct regions (core, margin and edge) grown in three common gardens replicated along a latitudinal gradient. Genetic variation in phenology and growth showed low to moderate heritability and differentiation among regions, suggesting some potential to respond to selection. Phenology traits were highly plastic, but this plasticity was generally neutral or maladaptive in the effect on growth, revealing a potential liability under warmer climates. These results suggest future climate adaptation will depend on the regional availability of genetic variation in red spruce and provide a resource for the design and management of assisted gene flow.This article is part of the theme issue ‘Species’ ranges in the face of changing environments (Part II)’.