Climatic adaptation of boreal tree species - Tree breeding in the Nordic countries. Proceedings from the 1998 joint meeting of Nordic Group for the Management of Genetic Resources of Trees and Nordic Arboretum Council, Honne konferansesenter, Biri, June 25-27, 1998

adaptation arbre forestier arbre pour bois de construction betula boreal forests breeding value climatic factors cold crecimiento croissance ecotipos ecotypes escandinavia facteur climatique fitomejoramiento forest trees fotoperiodismo frio froid genetic resources genetic variation growth photoperiodicity picea pinus plant breeding populus procedencia provenance resistencia a la temperatura salix scandinavia scandinavie seed selection semence semillas silvicultura silviculture sylviculture temperature resistance timber trees