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ABSTRACT
Noble fir is the leading Christmas tree produced in the US Pacific Northwest (PNW). This study is based on evaluations of 24,721 trees collected from five native collection regions in Oregon and Washington plus imported seed from Denmark. The major collection areas were further subdivided into provenances utilizing 16 in the PNW and 6 from Denmark. A total of 22 test sites were evaluated from progeny trials planted between 1996 and 2007. Traits important for commercial Christmas tree production were evaluated and include commercial height, tree grade, value and colour. Tree height and quality were positively correlated while colour showed little correlation with either trait. Provenances from the Oregon Coast and Willapa Hills, Washington provided the highest potential gain for Christmas tree market value. Provenances from Denmark exhibited superior colour and slow growth. For breeding purposes, the gain from backwards selection estimated a range of improvement in marketable value from 0.91 to 1.22 Euros per tree.
Acknowledgements
The authors gratefully acknowledge assistance from the following associations and individuals-Pacific Northwest Christmas Tree Growers Association, Danish Christmas Tree and Greenery Association, Barney Douglas, Rick Fletcher, Mike Bondi, Jim Heater, Ken Brown, Finn Jakobsen, Cheng Ying, Brad Withrow-Robinson, Amy Grotta, Judy Kowalski, Jim Bays, Mark Schmidlin, Mike Ramsby, John Tillman, Heather Stoven, Kathy Riley. Special thanks to the growers that hosted field trials and numerous others who assisted in the plot evaluations, seed collection and growing.
Disclosure statement
No potential conflict of interest was reported by the authors.