1. Unidad Docente de Anatomía; Fisiología y Genética Forestal; E.T.S.I. Montes; Universidad Politécnica de Madrid (UPM); Ciudad Universitaria s/n; 28040; Madrid; Spain
2. Dept. of Forest Ecology and Genetics; Forest Research Centre; INIA; Crta. La Coruña km 7,5; 28040; Madrid; Spain
3. School of Biological Sciences; University of Sydney; Heydon-Laurence Building A08; Sydney; New South Wales; 2006; Australia