Publication Title: 
Cobo-Simon, et al. (2021)
Title: 
Gene frequency shift in relict Abies pinsapo forests associated with drought-induced mortality. Preliminary evidences of local-scale divergent selection
Authors: 
Cobo-Simon, Irene, Mendez-Cea, Belen, Wegrzyn, Jill, Linares, Juan Carlos, Gallego Francisco Javier
Publication Year: 
2021
Series Name: 
Journal Of Forestry
Abstract: 
Current climate change constitutes a challenge for the persistence of several drought-sensitive plant species. The study of the genetic basis of adaptation offers a suitable way to understand how tree species may respond to future climatic conditions and to the design of conservation and management strategies. Here, we focus on genetic signatures of selection on the drought sensitive relict fir, Abies pinsapo. Field sampling of 156 individuals was performed in two elevation ecotones, characterized by widespread A. pinsapo decline and mortality. Dead trees were investigated and compared to live individuals, as well as those belonging to different ages and elevations. We studied the genes outward potassium channel GORK and PIP1 aquaporin, previously related to drought response in plant model species, to test whether drought is the main abiotic factor driving A. pinsapo forests decline. A combination of linear regression and factor models were used to test these selection signatures, as well as Fst for analyzing genetic structure. The results were consistent among these approaches, supporting a statistically significant association of GORK gene with survival in one of the A. pinsapo populations. These results provide preliminary evidence on the potential role of the GORK gene in the resilience to drought of A. pinsapo.
Publication Species: 
Abies pinsapo (Spanish Fir)
Volume: 
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DOI: 
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