1. ID Forest – Biotecnología Forestal Aplicada, Calle Los Curtidores 17, 34004, Palencia, Spain
2. Department of Plant Production and Forest Resources, University of Valladolid, Avenida de Madrid 44
3. 4071 Palencia, Spain. 3Department of Agronomic Sciences, University of Valladolid, Avenida de Madrid 44, 34071 Palencia, Spain