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Genetic variation and additive inheritance of resistance of Eucalyptus globulus to possum browsing

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O'Reilly-Wapstra, JM and Potts, BM and McArthur, C (2004) Genetic variation and additive inheritance of resistance of Eucalyptus globulus to possum browsing. In: Eucalyptus in a Changing World. Proceedings of IUFRO Conference, 11-15 October 2004, Averio, Portugal.

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Abstract

Browsing of plantation seedlings and saplings by
herbivores is a major problem for the successful
establishment and management of plantations in
Australia. The use of natural plant resistance in
deployment or breeding programs may be an
option for reducing such browsing. We assessed
the variation in resistance of Eucalyptus globulus
races, provenances, and families to browsing by
the brushtail possum (Trichosurus vulpecula) in
common environment field trials and captive
feeding trials. There were significant genetic
based differences between provenances of E.
globulus in the extent to which they were
browsed, and sideroxylonals, a group of
defensive plant chemicals, were the most
important determinant of coppice foliage intake
by possums. Investigations of the resistance of
intra- and inter-race F1 hybrids indicated that
resistance of E. globulus to possum browsing is
additively inherited. These results suggest there
is potential to deploy genotypes with greater
resistance through appropriate selection and
breeding.

Item Type: Conference or Workshop Item (Paper)
Additional Information:

BM Potts.

Date Deposited: 22 Oct 2008 04:43
Last Modified: 18 Nov 2014 03:49
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