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Genetic variation in fire recovery and other fire‑related traits in a global eucalypt species

Citation

Hernandez, MA and Butler, JB and Ammitzboll, H and Freeman, JS and O'Reilly-Wapstra, J and Vaillancourt, RE and Potts, BM, Genetic variation in fire recovery and other fire‑related traits in a global eucalypt species, Tree Genetics & Genomes, 18 Article 42. ISSN 1614-2950 (2022) [Refereed Article]


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This article is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) License, (https://creativecommons.org/licenses/by/4.0/) which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made.

DOI: doi:10.1007/s11295-022-01572-9

Abstract

To understand the potential of forests to adapt to wildfire, we studied the genetic architecture of fire-related structural, damage and recovery traits in a globally important Australian forest tree species, Eucalyptus globulus. Fourteen traits were evaluated in an outcrossed F2 population in a field trial in Tasmania, Australia, which was burnt by a wildfire 14 years after planting. The trial also included open-pollinated families of the grandparental dwarf and tall ecotypes used to produce the F2 population. We studied the phenotypic correlations within the F2 population and performed quantitative trait loci (QTL) analyses using a linkage map comprised of 472 markers. Ecotype comparisons revealed that almost all traits were under genetic control, with trees of the dwarf ecotype significantly more damaged and mainly recovering from lignotubers, whereas tall ecotype trees mainly recovered from epicormic resprouts extending for a variable height up the stem. Within the F2, tree size was negatively correlated with fire damage and positively correlated with recovery. Genetic control of fire-related traits was confirmed by the detection of 38 QTL in the F2 population. These QTL accounted for 4 to 43% of the phenotypic variation in these traits. Several QTL co-located and likely reflect pleiotropic effects. However, many independent QTL were detected, including QTL for crown consumption and trunk scorch, epicormic resprouting, resprout herbivory, and seedling establishment. The QTL detected argue that many genetically controlled mechanisms are responsible for variation in fire damage and recovery.

Item Details

Item Type:Refereed Article
Keywords:epicormic resprouting, eucalyptus globulus, herbivory, QTL analysis, seedling recruitment, wildfire
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Forestry sciences
Research Field:Forestry fire management
Objective Division:Environmental Policy, Climate Change and Natural Hazards
Objective Group:Adaptation to climate change
Objective Field:Ecosystem adaptation to climate change
UTAS Author:Hernandez, MA (Mr Mariano Hernandez)
UTAS Author:Butler, JB (Dr Jakob Butler)
UTAS Author:Ammitzboll, H (Mr Hans Ammitzboll)
UTAS Author:Freeman, JS (Dr Jules Freeman)
UTAS Author:O'Reilly-Wapstra, J (Professor Julianne O'Reilly-Wapstra)
UTAS Author:Vaillancourt, RE (Professor Rene Vaillancourt)
UTAS Author:Potts, BM (Professor Brad Potts)
ID Code:154235
Year Published:2022
Web of Science® Times Cited:1
Deposited By:Plant Science
Deposited On:2022-11-15
Last Modified:2022-12-23
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