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Genetic Variation in the Chemical Components of Eucalyptus globulus Wood


Stackpole, DJ and Vaillancourt, RE and Alves, A and Rodrigues, J and Potts, BM, Genetic Variation in the Chemical Components of Eucalyptus globulus Wood, G3: Genes, Genomes, Genetics, 1, (2) pp. 151-159. ISSN 2160-1836 (2011) [Refereed Article]


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Licenced under Attribution 3.0 Unported (CC BY 3.0)

DOI: doi:10.1534/g3.111.000372


Despite the ecological and economic importance of lignin and other wood chemical components, there are few studies of the natural genetic variation that exists within plant species and its adaptive significance. We used models developed from near infra-red spectroscopy to study natural genetic variation in lignin content and monomer composition (syringyl-to-guaiacyl ratio [S/G]) as well as cellulose and extractives content, using a 16-year-old field trial of an Australian tree species, Eucalyptus globulus. We sampled 2163 progenies of 467 native trees from throughout the native geographic range of the species. The narrow-sense heritability of wood chemical traits (0.250.44) was higher than that of growth (0.15), but less than wood density (0.51). All wood chemical traits exhibited significant broad-scale genetic differentiation (QST = 0.340.43) across the species range. This differentiation exceeded that detected with putatively neutral microsatellite markers (FST = 0.09), arguing that diversifying selection has shaped population differentiation in wood chemistry. There were significant genetic correlations among these wood chemical traits at the population and additive genetic levels. However, population differentiation in the S/G ratio of lignin in particular was positively correlated with latitude (R2 = 76%), which may be driven by either adaptation to climate or associated biotic factors.

Item Details

Item Type:Refereed Article
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Forestry sciences
Research Field:Tree improvement (incl. selection and breeding)
Objective Division:Plant Production and Plant Primary Products
Objective Group:Forestry
Objective Field:Hardwood plantations
UTAS Author:Stackpole, DJ (Mr Desmond Stackpole)
UTAS Author:Vaillancourt, RE (Professor Rene Vaillancourt)
UTAS Author:Potts, BM (Professor Brad Potts)
ID Code:72190
Year Published:2011
Web of Science® Times Cited:78
Deposited By:Plant Science
Deposited On:2011-08-23
Last Modified:2012-06-18
Downloads:334 View Download Statistics

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