Dungey__et__al__Can__J__For__Res__1997b.pdf (808.57 kB)
Mycosphaerella leaf disease: genetic variation in damage to Eucalyptus nitens, Eucalyptus globulus, and their F1 hybrid
journal contribution
posted on 2023-05-26, 16:10 authored by Dungey, HS, Bradley PottsBradley Potts, Carnegie, AJ, Ades, PKSeverity of Mycosphaere/la leaf disease was assessed on the adult and juvenile foliage ofboth controlled crossed and open-pollinated families ofEucalyptus globulus ssp. globulus Labill., Eucalyptus nitens (Deane & Maiden) Maiden, Eucalyptus globulus ssp. bicostata (Maiden, Blakely & 1. 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.
History
Publication title
Canadian Journal of Forest ResearchVolume
27Article number
5Number
5Pagination
750-759ISSN
0045-5067Publication status
- Published
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BM Potts. Copyright 2002. National Research Council. Please refer to the journal link for access to the definitive, published version. Under the Canadian Copyright Act, individuals may download or print single copies of articles for personal research or study. Any person may reproduce short excerpts from articles in the journals for any purpose that respects the moral rights of authors, provided that the source is fully acknowledged. As a courtesy, the consent of authors of such material should be obtained directly from the author.Repository Status
- Open
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