Journal article
Quambalaria shoot blight resistance in marri (Corymbia calophylla): Genetic parameters and correlations between growth rate and blight resistance
Tree Genetics & Genomes, Vol.18(1), Art. 8
2022
Abstract
Quambalaria shoot blight (QSB) has emerged recently as a severe disease of Corymbia calophylla (marri). In this study, QSB damage and growth were assessed in Corymbia calophylla trees at 4 and 6 years of age in two common gardens consisting of 165 and 170 open-pollinated families representing 18 provenances across the species’ natural distribution. There were significant differences between provenances for all traits. The narrow-sense heritability for growth traits and QSB damage at both sites were low to moderate. The genetic correlation between QSB damage and growth traits was negative; fast-growing families were less damaged by QSB disease. Age-age genetic correlations for individual traits at four and six years were very strong, and the type-B (site–site) correlations were strongly positive for all traits. Provenances from cooler wetter regions showed higher resistance to QSB. The QSB incidence at 6 years was significantly correlated with environmental factors of the provenance’s origin. The QSB incidence at years four and six was not correlated with the QSB expression in 3-month-old seedlings. Based on these results, selection for resistance could be undertaken using 4-year-old trees. There is potential for a resistance breeding program to develop populations of marri genetically diverse and resistant to QSB.
Details
- Title
- Quambalaria shoot blight resistance in marri (Corymbia calophylla): Genetic parameters and correlations between growth rate and blight resistance
- Authors/Creators
- H.T. Duong (Author/Creator) - Murdoch UniversityR. Mazanec (Author/Creator) - Department of Biodiversity, Conservation and AttractionsJ.A. McComb (Author/Creator) - Murdoch UniversityT. Burgess (Author/Creator) - Murdoch UniversityG.E.St.J. Hardy (Author/Creator) - Murdoch University
- Publication Details
- Tree Genetics & Genomes, Vol.18(1), Art. 8
- Publisher
- Springer
- Identifiers
- 991005543242707891
- Copyright
- © 2022 The Authors.
- Murdoch Affiliation
- School of Veterinary Medicine
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.40 Forestry
- 3.40.55 Forest Dynamics
- Web Of Science research areas
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- Genetics & Heredity
- Horticulture
- ESI research areas
- Plant & Animal Science