1. Joint Research Unit CTFC - AGROTECNIO, Av. Alcalde Rovira Roure 191, E-25198 Lleida, Spain
2. Department of Crop and Forest Sciences, University of Lleida, Av. Alcalde Rovira Roure 191, E-25198 Lleida, Spain
3. Instituto Pirenaico de Ecología (IPE-CSIC), Av. Montañana 1005, E-50192 Zaragoza, Spain
4. Instituto Pirenaico de Ecología (IPE-CSIC), Av. Ntra. Sra. de la Victoria, S/N, E-22700 Jaca, Huesca, Spain
5. School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China