Please Note:

The Open Access Repository has moved to a new authentication system as of the 1st of November.

Account holders will now be able to login using their University of Tasmania credentials.
If you have trouble logging in please email us on so we can assist you.

Public users can still access the records in this repository as normal

Open Access Repository

The effects of drying temperature and method of assessment on the expression of genetic variation in gross shrinkage of Eucalyptus globulus wood samples


Downloads per month over past year

Hamilton, MG and Harwood, CE and Potts, BM (2009) The effects of drying temperature and method of assessment on the expression of genetic variation in gross shrinkage of Eucalyptus globulus wood samples. Silvae Genetica, 58 (5-6). pp. 252-261. ISSN 0037-5349

This is the latest version of this item.

[img] PDF
09)_The_effects...pdf | Request a copy
Full text restricted
Available under University of Tasmania Standard License.


Genetic variation in wood-sample gross shrinkage and basic density was examined in a Eucalyptus globulus base population trial growing in Tasmania, Australia. Gross shrinkage, which includes all components of shrinkage including collapse, was assessed in four ways (calliper- and visually-assessed tangential shrinkage, volumetric shrinkage and radial shrinkage) on samples dried at three temperatures (22°C, 60°C and 105°C). Significant differences between subraces were observed using all measures of gross shrinkage for two or more of the three drying treatments. Furthermore, significant additive genetic variation within subraces was observed in calliper- and visually-assessed gross shrinkage under two or more of the drying treatments, with narrow-sense heritabilities greater than or equal to 0.35. There was no obvious trend in heritabilities or coefficients of additive genetic variation with drying temperature. Under the 105°C drying treatment, subrace correlations among calliper-, visually- and volume-assessed gross shrinkage were positive and very strong (0.97), while these measures were less strongly correlated with radial gross shrinkage at the subrace level (0.77). Within subrace genetic correlations among the first three measures were also strongly positive (0.95). These high genetic correlations suggest that different drying regimes and the calliper, visual and volume methods of assessment could be used interchangeably to select for reduced tangential gross shrinkage. Estimated subrace and genetic correlations between basic density and measures of gross shrinkage were universally negative (i.e. favourable), although not all were significantly different to zero.

Item Type: Article
Keywords: Heritability, genetic correlation, genotype-by-drying- regime interaction, drying defect, shrinkage, collapse, basic density
Journal or Publication Title: Silvae Genetica
Page Range: pp. 252-261
ISSN: 0037-5349
Date Deposited: 31 May 2010 06:50
Last Modified: 31 May 2010 06:50
Item Statistics: View statistics for this item

Available Versions of this Item

Actions (login required)

Item Control Page Item Control Page