Genetic variation in oleoresin physiology of Scotch pine [Pinus sylvestris]

Genetic variation in chemical, physiological, and anatomical traits associated with the oleoresin physiology of Scotch pine was studied in a rangewide provenance plantation. The resin acids showed strong positive correlations with each other. Nine of thirteen resin acids and total resin acids showed genetic variation, with seed sources from Scandinavia having the highest concentrations and those from central Europe the lowest. The resin acids as a group show evidence of pleiotropy, but all of the physical traits were genetically independent of each other.