Comparison of noble fir progeny from US Pacific Northwest collection regions and Denmark for Christmas tree traits

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.

KEYWORDS:

• Abies procera
• Christmas tree quality
• colour
• grade
• height
• value

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.

Additional information

Funding

A variety of groups assisted with partial funding over the years including the Pacific Northwest Christmas Tree Growers Association, Green Development and Demonstration Program (Denmark), Agricultural Research Foundation (Oregon State University), Oregon Department of Agriculture Block Grant.