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:	Refereed Article
Keywords:	community genetics, Eucalyptus globulus, extended phenotype, formylated phloroglucinols, herbivory, plant secondary metabolites.
Research Division:	Biological Sciences
Research Group:	Genetics
Research Field:	Molecular evolution
Objective Division:	Plant Production and Plant Primary Products
Objective Group:	Forestry
Objective Field:	Native forests
UTAS Author:	Freeman, JS (Dr Jules Freeman)
UTAS Author:	O'Reilly-Wapstra, JM (Professor Julianne O'Reilly-Wapstra)
UTAS Author:	Vaillancourt, RE (Professor Rene Vaillancourt)
UTAS Author:	Wiggins, NL (Dr Natasha Wiggins)
UTAS Author:	Potts, BM (Professor Brad Potts)
ID Code:	52424
Year Published:	2008
Web of Science® Times Cited:	31
Deposited By:	Plant Science
Deposited On:	2008-07-09
Last Modified:	2009-05-14
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