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Genetic control of interactions among individuals: Contrasting outcomes of indirect genetic effects arising from neighbour disease infection and competition in a forest tree

Citation

Costa e Silva, J and Potts, BM and Bijma, P and Kerr, RJ and Pilbeam, DJ, Genetic control of interactions among individuals: Contrasting outcomes of indirect genetic effects arising from neighbour disease infection and competition in a forest tree, New Phytologist, 197, (2) pp. 631-641. ISSN 0028-646X (2013) [Refereed Article]

Copyright Statement

Copyright 2012 The Authors New Phytologist copyright  2012 New Phytologist Trust.

DOI: doi:10.1111/nph.12035

Abstract

Indirect genetic effects (IGEs) are heritable effects of individuals on trait values of their conspecifics. IGEs may substantially affect response to selection, but empirical studies on IGEs are sparse and their magnitude and correlation with direct genetic effects are largely unknown in plants. Here we used linear mixed models to estimate genetic (co)variances attributable to direct and indirect effects for growth and foliar disease damage in a large pedigreed population of Eucalyptus globulus. We found significant IGEs for growth and disease damage, which increased with age for growth. The correlation between direct and indirect genetic effects was highly negative for growth, but highly positive for disease damage, consistent with neighbour competition and infection, respectively. IGEs increased heritable variation by 71% for disease damage, but reduced heritable variation by 85% for growth, leaving nonsignificant heritable variation for later age growth. Thus, IGEs are likely to prevent response to selection in growth, despite a considerable ordinary heritability. IGEs change our perspective on the genetic architecture and potential response to selection. Depending on the correlation between direct and indirect genetic effects, IGEs may enhance or diminish the response to natural or artificial selection compared with that predicted from ordinary heritability. Β© 2012 The Authors. New Phytologist Β© 2012 New Phytologist Trust.

Item Details

Item Type:Refereed Article
Keywords:eucalypt genetics, competition, direct and indirect genetic effects, disease infection, Eucalyptus globulus, heritable variation, intraspecific interactions, response to selection
Research Division:Biological Sciences
Research Group:Genetics
Research Field:Population, Ecological and Evolutionary Genetics
Objective Division:Plant Production and Plant Primary Products
Objective Group:Forestry
Objective Field:Hardwood Plantations
Author:Potts, BM (Professor Brad Potts)
Author:Kerr, RJ (Dr Richard Kerr)
ID Code:82215
Year Published:2013
Funding Support:Australian Research Council (LP0884001)
Web of Science® Times Cited:15
Deposited By:Plant Science
Deposited On:2013-01-21
Last Modified:2017-11-03
Downloads:0

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