A morphometric analysis of spontaneous and artificial hybrids of Pinus mugo x sylvestris (Pinaceae)

Abstract

Hybridization among Pinus mugo and P. sylvestris is visualized in Well's distance diagrams using either equally or differently weighed characters. Parents and hybrids are better resolved n diagrams using differently weighted characters. Putative hybrids from mixed, planted or naturalized stands of P. mugo and P. sylvestris in SW and NW Jutland, Denmark, are compared with artificial F1 and spontaneous material of P. mugo x sylvestris (P.(x) rhaetica) from the Alps and the Pyrenees. The natural hybrids are primary hybrids, rather than introgressants.