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Early Results of Provenance Hybridization in Black Spruce

Provenances of black spruce (Picea mariana (Mill.) B.S.P.) from Ontario, Quebec, New Brunswick, and Newfoundland were crossed: individual mother trees in 9 provenances received a pollen mixture from Chalk River, Ontario, and trees in the 10th provenance a mixture from Little Pic River, Ontario. The resulting hybrids were grown together with open-pollinated control lots from the locality of origin of the female parents in a greenhouse experiment for 16 months and subsequently in a plantation, which was subject to winter desiccation, to the age of 5 years. Measurements were made and analyzed to see whether the fast growth of southern and the hardiness of northern provenances could be combined and if heterosis exists in the resulting hybrid populations.


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Author(s): E. K. Morgenstern

Publication: Tree Improvement and Genetics - Northeastern Forest Tree Improvement Conference - 1973