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Hybridization Among White, Red, Blue, and White X Blue Spruces

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Crosses between white spruce (Picea glauca), red spruce (P. rubens), blue spruce (P. pungens), and (P. glauca x P. pungens) from several seed and pollen parents were made during 1974-76. The seeds were grown for 6 months with the aid of continuous illumination and several characters were measured to verify the hybridity of the seedlings. Hybrids of rubens with glauca and (glauca x pungens) were verified on the basis of differences in needle color, number of needle serrations, and concentrations of 3-carene, limonene, and -pinene in the cortical oleoresin. P. glauca x pungens hybrids were verified with more difficulty by a combination of needle curvature and 3-carene concentration. The backcrosses, (glauca x pungens) xglauca and (glauca x pungens) x pungens, were differentiated from each other by growth rate, needle curvature, and concentrations of 3-carene and -pinene. For most traits, putative hybrids were intermediate to their parents. However, F2 glauca x pungens hybrids were severely stunted, possibly owing to consanguinity of the parents. Forest Sci. 28:129-134.
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Keywords: Picea glauca; Picea glauca x P. pungens; Picea pungens; Picea rubens

Document Type: Journal Article

Affiliations: Professor, Department of Forestry, Michigan State University, East Lansing, Michigan 48824

Publication date: 1982-03-01

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    Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
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    June 1, 2016 to Feb. 28, 2017

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