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Quantitative trait loci for key defensive compounds affecting herbivory of eucalypts in Australia


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Freeman, JS, O’Reilly-Wapstra, J ORCID: 0000-0003-4801-4412, Vaillancourt, RE, Wiggins, NL and Potts, BM 2008 , 'Quantitative trait loci for key defensive compounds affecting herbivory of eucalypts in Australia' , New Phytologist, vol. 178, no. 4 , pp. 846-851 , doi: 10.1111/j.1469-8137.2008.02417.x.

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• Formylated phloroglucinols (FPCs) are key defensive compounds that influence
herbivory by mammals and arthropods in eucalypts. However, the genetic architecture
underlying variation in their levels remains poorly understood.
• Quantitative trait loci (QTL) analysis for the concentrations of two major FPCs,
sideroxylonal A and macrocarpal G, was conducted using juvenile leaves from 112
clonally duplicated progenies from an outcross F2 of Eucalyptus globulus.
• Two unlinked QTL were located for macrocarpal, while another unlinked QTL
was located for sideroxylonal. The sideroxylonal QTL collocated with one for
total sideroxylonal previously reported using adult Eucalyptus nitens foliage,
providing independent validation in a different evolutionary lineage and a different
ontogenetic stage.
• Given the potential widespread occurrence of these QTL, their ontogenetic stability,
and their impact on a range of dependent herbivores, it is possible that they have
extended phenotypic effects in the Australian forest landscape.

Item Type: Article
Authors/Creators:Freeman, JS and O’Reilly-Wapstra, J and Vaillancourt, RE and Wiggins, NL and Potts, BM
Keywords: community genetics, Eucalyptus globulus, extended phenotype, formylated phloroglucinols, herbivory, plant secondary metabolites.
Journal or Publication Title: New Phytologist
ISSN: 0028-646X
DOI / ID Number: 10.1111/j.1469-8137.2008.02417.x
Additional Information:

BM Potts. The definitive version is available at

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