Publication Date:
1987-05-01
Description:
The cross white spruce, Piceaglauca (Moench) Voss, × Sitka spruce, Piceasitchensis (Bong.) Carr., was attempted on over 18 000 ovulate strobili on 29 clones of white spruce with pollens from 45 clones of Sitka spruce. All 300 single pair matings and 18 polycross matings were successful in that they produced one or more full seeds per cone. The cross white × white spruce was simultaneously attempted on over 3500 strobili on the same 29 clones. Crossability estimates, determined on an individual cross basis or on a year basis, were highly variable. Average crossability, based on data acquired over 7 years, is 54 to 55% and indicates a close relationship between white and Sitka spruce. White, Sitka, and Engelmann spruce, P. engelmannii (Parry) Engelm., should be assigned to section Omorika, subsection Glaucoides of the genus Picea.
Print ISSN:
0045-5067
Electronic ISSN:
1208-6037
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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