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Genetic resistance of Eucalyptus globulus to autumn gum moth defoliation and the role of cuticular waxes


Jones, TH and Potts, BM and Vaillancourt, RE and Davies, NW, Genetic resistance of Eucalyptus globulus to autumn gum moth defoliation and the role of cuticular waxes, Canadian Journal of Forest Research, 32, (11) pp. 1961-1969. ISSN 0045-5067 (2002) [Refereed Article]

DOI: doi:10.1139/x02-118


This study investigated the association between resistance of Eucalyptus globulus Labill. to autumn gum moth (Mnesempala privata Guenée) defoliation and cuticular wax compounds. In a field trial consisting of clonally replicated F 2 families of E. globulus, situated in Tasmania, Australia, significant genetic variation in resistance was detected in two of three F 2 families. The broad-sense heritability for defoliation within families ranged from 0.24 to 0.33. The 15 most resistant and the 15 most susceptible genotypes within each variable family were compared for their relative levels of 26 cuticular wax compounds. While no significant correlation between resistance and total wax yield estimates was found, significant differences were detected between resistant and susceptible classes in the relative quantities of several aliphatic phenylethyl and benzyl wax esters within both families. This association does not appear to be a response induced by defoliation. The broad-sense heritabilities of the variation in these compounds were high (0.82-0.94). Our findings suggest that these wax compounds are a mechanism of genetic resistance to autumn gum moth in E. globulus.

Item Details

Item Type:Refereed Article
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Forestry sciences
Research Field:Forest health and pathology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Forestry
Objective Field:Hardwood plantations
UTAS Author:Jones, TH (Mr Timothy Jones)
UTAS Author:Potts, BM (Professor Brad Potts)
UTAS Author:Vaillancourt, RE (Professor Rene Vaillancourt)
UTAS Author:Davies, NW (Associate Professor Noel Davies)
ID Code:25435
Year Published:2002
Web of Science® Times Cited:49
Deposited By:Plant Science
Deposited On:2002-08-01
Last Modified:2011-08-02

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