Canadian Forest Service Publications
Interactions between genotype, site and silvicultural treatment. 1982. Morgenstern, E.K. Environment Canada, Canadian Forestry Service, Petawawa National Forestry Institute, Chalk River, Ontario. 18 p. Information Report PI-X-14.
Issued by: National Capital Region
Catalog ID: 32600
Series: Information Report (Petawawa)
Interactions are considered from the viewpoint of factorial experiments in genetics and silviculture where significant interactions imply that treatments are not independant. This review is based on 38 experiments dealing with 21 species in the genera Alnus, Larix, Picea, Pinus, Populus, Pseudotsuga, and Quercus. Traits considered are: juvenil growth and phenology, color and morphology, survival and hardiness, nutrient requirements, insect and disease susceptibility, growth and yield, and spacing. Interpretation of the results depends upon an appreciation of genetic variation within the species and the particular problems of sampling and testing in each experiment. Some of the obvious factors that underlie interactions are climatic and soil differences between seed origin and test habitat and differences in genetic buffering between test populations. There are interactions that have defied interpretation but the application of special analyses and closer attention to environments should make it possible to interpret more of these difficult cases in future years.