Please Note:

The Open Access Repository will be moving to a new authentication system on the 1st of November.

From this date onwards, account holders will be required to login using their University of Tasmania credentials.
If your current repository username differs from your University username, please email E.Prints@utas.edu.au so we can update these details on your behalf.

Due to the change, there will be a short outage of the repository from 9am on the morning of the 1st of November

Open Access Repository

Genetic variation in Eucalyptus globulus for susceptibility to Mycosphaerella nubilosa and its association with tree growth

Downloads

Downloads per month over past year

Milgate, AW and Potts, BM and Joyce, K and Mohammed, CL and Vaillancourt, RE (2005) Genetic variation in Eucalyptus globulus for susceptibility to Mycosphaerella nubilosa and its association with tree growth. Australasian Plant Pathology, 34 (1). pp. 11-18. ISSN 0815-3191

[img] PDF
MilgateQG2005.pdf | Request a copy
Full text restricted

Abstract

Mycosphaerella species are fungal leaf pathogens of Eucalyptus globulus, one of the major plantation tree species in temperate regions of the world. We examined the quantitative genetic variation in susceptibility to infection by Mycosphaerella nubilosa in a genetically diverse population of E. globulus families growing in a field trial in north-west Tasmania. Disease incidence and severity were assessed on juvenile foliage following a heavy epidemic where mean leaf area damage was 34%. Disease incidence was uniform across the trial. Significant genetic variation for susceptibility was detected with a narrow sense heritability of disease severity being the highest yet reported (h2 = 0.60) for a Mycosphaerella disease of eucalypts. Mycosphaerella nubilosa damage had a significant deleterious impact on tree growth at both the phenotypic and genetic level. We suggest that E. globulus has at least two mechanisms involved in avoiding the deleterious affects of this disease, one is through resistance of the juvenile foliage per se and the other is through the ontogenetic switch to the resistant adult foliage. There is ample opportunity to select genotypes of E. globulus that are relatively resistant to damage and if these are deployed in areas of high disease risk, significant benefits in plantation productivity could be obtained.

Item Type: Article
Keywords: Disease resistance, eucalypt, heritability
Journal or Publication Title: Australasian Plant Pathology
Page Range: pp. 11-18
ISSN: 0815-3191
Identification Number - DOI: 10.1071/AP04073
Additional Information:

Copyright © 2005 CSIRO
BM Potts.

Date Deposited: 03 Sep 2008 04:16
Last Modified: 18 Nov 2014 03:49
Item Statistics: View statistics for this item

Actions (login required)

Item Control Page Item Control Page
TOP