Hybridization Among White, Red, Blue, and White X Blue Spruces
Authors: Bongarten, Bruce C.1; Hanover, James W.1
Source: Forest Science, Volume 28, Number 1, 1 March 1982 , pp. 129-134(6)
Publisher: Society of American Foresters
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Abstract:
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 β-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 β-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.Keywords: Picea glauca; Picea rubens; Picea pungens; Picea glauca x P. pungens
Document Type: Journal article
Affiliations: 1: Professor, Department of Forestry, Michigan State University, East Lansing, Michigan 48824
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