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Results of artificial fertilization of P. uliginosa with P. sylvestris and P. mugo are presented and discussed. P. sylvestris and P. mugo are thought to be the parental species of P. uliginosa. Two grafts of one P. uliginosa clone from Arboretum of the Institute of Dendrology in Kórnik, Poland were used as mother individuals. One individual of P. sylvestris and one individual of P. mugo were the pollen donors. Three mature cones were obtained as the result of artificial pollination of P. uliginosa with P. mugo pollen. Out of 107 seeds, 68 were filled what gives 63%. P. uliginosa conelets pollinated with P. sylvestris pollen were all aborted. Based on obtained data, close phylogenetic relationship between P. uliginosa and P. mugo complex is suggested.

Short Note: Crossability Between Pinus uliginosa and its Putative Parental Species Pinus sylvestris and Pinus mugo