Ref ID: 1413
Ref Type: Journal
Authors: Dungey, H. S., Potts, B. M., Carnegie, A. J., and Ades, P. K.
Pub Date: 1997
Journal Name: Canadian Journal of Forest Research
Volume: 27
Issue:
Start Page: 750
End Page: 759
ISBN/ISSN:
Keywords: Australia/damage/environment/Eucalyptus/Eucalyptus globulus/Eucalyptus nitens/Eucalyptus regnans/frost/variation/growth/hybrid/population/provenance/selection/Tasmania/Mycosphaerella/leaf/disease/juvenile/foliage/family/Eucalyptus globulus ssp.globulus/Labill/Deane/Maiden/F1/trial/interspecific/susceptibility/value/heritability/breeding/progeny/complex/genetics/interaction/phase/phase change
Abstract: Severity of Mycosphaerella leaf disease was assessed on the adult and juvenile foliage of both controlled crossed and open-pollinated families of Eucalyptus globulus ssp. globulus Labill., Eucalyptus nitens (Deane & Maiden) Maiden, Eucalyptus globulus ssp. bicostata (Maiden, Blakely & J. Simm.) Kirkpatr., and their F1 hybrids in a trial in northwest Tasmania, Australia. Within ssp, globulus, disease was more severe on one provenance, Taranna, than another, King Island. For interprovenance hybrids, differences between parents were inherited in an additive manner, whereas interspecific hybrids were generally more susceptible than predicted intraspecific midparent values and occasionally, were more susceptible than the more susceptible parent. Within populations, the narrow-sense heritabilities for Mycosphaerella disease severity were low to moderate (0.004-0.506), but were consistently higher for adult than for juvenile foliage despite disease severity being higher on juvenile foliage. Parental breeding values and heritabilities estimated from open-pollinated progeny were similar to estimates obtained from controlled crosses involving the same parents. Complex genetic interactions were detected between growth, vegetative phase change, and disease severity. It is possible that selection for rapid growth in an environment without disease may result in indirect selection for susceptibility.
Notes: BMP A1 Refereed Journal CRC_4
Label: BMP
Reprint: In File
Program: SPF Genetic Improvement
Project: A1
Deliverable:
Confidentiality: Public
Availability:
Report: Annual Report 1997/8
Type:
Address: B.M.Potts@utas.edu.au