Genetic and environmental variation in wood properties of Acacia melanoxylon
Bradbury, GJ and Potts, BM and Beadle, CL (2011) Genetic and environmental variation in wood properties of Acacia melanoxylon. Annals of Forest Science, 68 . pp. 1363-1373. ISSN 1286-4560
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Official URL: http://dx.doi.org/10.1007/s13595-011-0115-x
-Context Australian blackwood (Acacia melanoxylon), is a
fast-growing, high-quality, appearance-grade timber species
native to eastern Australia. Some of its key wood properties
are percentage heartwood, heartwood colour, basic density,
wood stiffness and green moisture content. Variation in these
properties affects log value, processing and marketing.
- Aims This study aims to understand how genetics and
environment affect these wood properties.
- Methods Stem cores were taken from 16 open-pollinated
blackwood families from the island of Tasmania, Australia,
which were planted across three 18-year-old progeny trials.
-Results Significant effects of genetics, environment and
their interaction (GxE) were found for many of the wood
properties examined. Both broad-scale and local environmental
effects were apparent, with local effects associated
with competition and/or allelopathy from a Eucalyptus
globulus nurse crop present in one trial. No significant
correlation of growth rate (i.e. stem diameter) with wood
properties was detected at the family level apart from a
positive relationship with heartwood width. At the phenotypic
level, there were many significant correlations
including growth rate with heartwood width, but not with
basic density, or wood stiffness measured as standing tree
time of flight. Faster growing trees had yellower heartwood
while trees with higher basic and green densities tended to
have darker, redder and less yellow heartwood.
- Conclusion Both genetic and environment factors affect
key wood properties of Australian blackwood, but in most
cases these effects were independent of growth rate.
|Additional Information:||The final publication is available at http://www.springerlink.com.
|Keywords:||Blackwood, Genetics, Wood colour, Tonewood|
|Deposited By:||Professor Brad M Potts|
|Deposited On:||02 Dec 2011 12:17|
|Last Modified:||02 Dec 2011 12:17|
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