Dissertation
Reproductive Biology, Hybridisation and Gene Flow of Corymbia torelliana and Corymbia citriodora
University of the Sunshine Coast, Queensland
Doctor of Philosophy, University of the Sunshine Coast
2012
DOI:
https://doi.org/10.25907/00636
Abstract
Corymbia hybrids are of increasing importance to plantation forestry due to their high quality, durable timber, wide adaptability to marginal environments and their advantages over parental Corymbia species, including superior growth, disease, insect and frost tolerance. Corymbia hybridisation programs in Australia have investigated numerous hybrid combinations using five Corymbia taxa, however there is little understanding of the mechanisms controlling interspecific reproductive isolation and reproductive success between Corymbia taxa. Greater knowledge of the reproductive biology controlling interspecific Corymbia hybridisation is urgently required to advance commercial hybrid breeding programs and to quantify risks of genetic introgression into native Corymbia populations. This thesis describes a series of controlled pollination studies which were implemented to improve knowledge of the reproductive biology and breeding systems of Corymbia hybrids. The research determined (1) Suitable controlled pollination methodologies for creating Corymbia hybrids, (2) Influence of taxonomic affinity between parental taxa on the reproductive success of interspecific Corymbia hybridisation, (3) Efficacy and locations of pre- and post-zygotic isolating barriers which may influence interspecific Corymbia hybridisation, (4) Reproductive success of reciprocal and advanced generation hybrids between C. citriodora, C. torelliana and their hybrids and (5) Implications for advancement of Corymbia hybrid breeding and the management of environmental gene flow risk.
Details
- Title
- Reproductive Biology, Hybridisation and Gene Flow of Corymbia torelliana and Corymbia citriodora
- Authors
- Geoffrey R Dickinson
- Contributors
- Helen M Wallace (Supervisor)
- Awarding institution
- University of the Sunshine Coast
- Degree awarded
- Doctor of Philosophy
- Publisher
- University of the Sunshine Coast, Queensland
- DOI
- 10.25907/00636
- Organisation Unit
- School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; GeneCology Research Centre - Legacy
- Language
- English
- Record Identifier
- 99450502302621
- Output Type
- Dissertation
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