Ref ID: 8251
Ref Type: Journal
Authors: Jordan, G. J., Potts, B. M., and Clarke, A. R.
Pub Date: 2002
Journal Name: Forest Ecology and Management
Volume: 160
Issue: 1-3
Start Page: 189
End Page: 199
ISBN/ISSN:
Keywords: Eucalyptus/Eucalyptus globulus/defoliation/Perga affinis ssp.insurlaris/plantation/susceptibility/potential/impact/plantation productivity/productivity/sawfly/Perga/species/pest/tree/pattern/quantitative/genetic/genetic variation/variation/affinis/data/trial/damage/growth/season/race/plant/fitness/correlations/mortality/basal/effect/model/infestation
Abstract: Sawflies (Perga species) are leaf-damaging pests of the major plantation tree species Eucalyptus globulus ssp. globulus. This work describes the patterns of quantitative genetic variation in susceptibility to attack by Perga affinis ssp. insularis, based on data from a large open-pollinated trial containing genetic material from throughout the geographic range of E. globulus ssp. globulus. Forty three per cent of the trees in the trial exhibited damage from sawflies in either their sixth or seventh growth seasons. The incidence of damage was genetically based, with significant variation between geographic races of E. globulus ssp. globulus and highly heritable ðh2 ¼ 0:43 0:05Þ variation in damage incidence within races. Susceptibility to sawfly damage significantly affects plant fitness with both genetic and environmental correlations emonstrating that sawfly damage causes slow growth and increased mortality of trees. Mild and severe sawfly damage resulted in 16 and 31% reduction in the basal area of surviving trees, and the effect was consistent across races and amilies. Based on this data, we propose a model predicting relative plantation productivity of races of different susceptibility under different infestation egimes.
Notes: Entered by morgs (14/12/2000):
Reprint: Not in File
Program: SPF Resource Protection; SPF Genetic Improvement
Project: C1; A1
Deliverable: C1-2; A1-1
Confidentiality: Public
Availability: Authors
Report: Annual Report 2000/1; Annual Report 2001/2
Type: Article
Address: Greg.Jordan@utas.edu.au