Skip to Main Content
Specific gravity of hybrid poplars in the north-central region, USA: within-tree variability and site × genotype effectsAuthor(s): William L. Headlee; Ronald S. Jr. Zalesny; Richard B. Hall; Edmund O. Bauer; Bradford Bender; Bruce A. Birr; Raymond O. Miller; Jesse A. Randall; Adam H. Wiese
Source: Forests. 4: 251-269.
Publication Series: Scientific Journal (JRNL)
Station: Northern Research Station
View PDF (267.28 KB)
DescriptionSpecific gravity is an important consideration for traditional uses of hybrid poplars for pulp and solid wood products, as well as for biofuels and bioenergy production. While specific gravity has been shown to be under strong genetic control and subject to within-tree variability, the role of genotype × environment interactions is poorly understood. Most specific gravity reports are for a limited number of locations, resulting in a lack of information about the interactions between clones and sites over a wide range of climate and soil conditions. The objective of the current study was to characterize the effects of bole position, site, clone, and site × clone interactions for twelve hybrid poplar genotypes grown in Iowa, Minnesota, Wisconsin, and Michigan, USA. Observed specific gravities ranged from 0.267 to 0.495 (mean = 0.352 ± 0.001 for 612 samples taken from 204 trees), with bole position and site × clone interactions having significant effects on specific gravity. Further investigation of the site × clone interactions indicated that environmental conditions related to water stress were key predictors of specific gravity. These data are important for informing genotypic selection and silvicultural management decisions associated with growing hybrid poplars.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, firstname.lastname@example.org if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationHeadlee, William L.; Zalesny, Ronald S. Jr.; Hall, Richard B.; Bauer, Edmund O.; Bender, Bradford; Birr, Bruce A.; Miller, Raymond O.; Randall, Jesse A.; Wiese, Adam H. 2013. Specific gravity of hybrid poplars in the north-central region, USA: within-tree variability and site × genotype effects. Forests. 4: 251-269.
Keywordsbiomass, bole position, clones, correlation, feedstock quality, Populus, short rotation woody crops, tree growth, water stress, wood density
- Poplar breeding and testing strategies in the north-central U.S.: Demonstration of potential yield and consideration of future research needs1
- Clonal variation in survival and growth of hybrid poplar and willow in an in situ trial on soils heavily contaminated with petroleum hydrocarbons
- Evaluation of field performance of poplar clones using selected competition indices.
XML: View XML