Received: 13 September 2017
Accepted: 23 September 2018
First Online: 12 October 2018
Ethics approval and consent to participate
: The sampling was non-destructive and the trees were part of an experimental plantation established for research on land of the government of Québec. A collaborative research agreement between the organizations as part of the Arborea II project gave permission for the sampling, which followed guidelines of the institutions involved in the research and in force in Québec (Canada). We thank the Canadian Forest Service (Laurentian Forestry Centre) for allowing the white spruce field test and the Ministère des Forêts, de la Faune et des Parcs du Québec (MFFPQ) for accessing the Mastigouche arboretum where plant samples were sourced.
: Not applicable.
: The authors declare that they have no competing interests.
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