RNGR.net is sponsored by the USDA Forest Service and Southern Regional Extension Forestry and is a colloborative effort between these two agencies.

U.S. Department of Agriculture USDA Forest Service Southern Regional Extension Forestry Southern Regional Extension Forestry

Greenhouse Grafting of Spruces and Hard Pines at the Petawawa Forest Experiment Station

Vegetative propagation has been used for many years by horticulturists for the multiplication of a great many varieties of fruit trees, shrubs, and ornamentals. It was not until 1936, however, that Dr. C. Syrach Larsen, in Denmark, outlined the use of vegetative propagation in tree breeding. Without the aid of various vegetative propagation techniques the tree breeders would have been forced to use the slow techniques of pure line breeding. Using vegetative propagation, however, it is now possible to (1) facilitate future breeding work by establishing in one place a collection of plus trees which would otherwise be widely scattered and often inaccessible; (2) duplicate any one plus tree in as many plants as required; and (3) under uniform conditions (of soil and climate) rate the plus trees for their relative qualities. The two methods of vegetative propagation that are of main interest in tree breeding work are (1) propagation by means of cuttings, and (2) propagation by means of grafting.


Download this file:

PDF document Download this file — PDF document, 93Kb

Details

Author(s): Mark J. Holst

Publication: Tree Improvement and Genetics - Lake States Forest Tree Improvement Conference - 1955