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Induced plant defence and the evolution of counter-defences in herbivores

Summary: Induced plant defence and the evolution of
counter-defences in herbivores
Shea N. Gardner
and Anurag A. Agrawal
Biology and Biotechnology Research Program, Lawrence Livermore National Laboratory,
PO Box 808, L-448, Livermore, CA 94551, USA and 2
Department of Botany, University of Toronto,
25 Willcocks Street, Toronto, Ontario M5S 3B2, Canada
We examine how induced plant defences affect the evolution of resistance in herbivores
(i.e. the ability to overcome plant defences) compared with constitutive defence strategies.
Since resistance of herbivores may evolve as a result of major monogenic and/or quantitative
(polygenic or gene amplification) genetic sources, and the selective pressure imposed by plant
defences affects the rate of evolution of each genetic source of resistance, we incorporate both
into a model of herbivore evolution. We combine Mendelian single-locus and quantitative
genetic models with a logistic population growth model based on an empirical plant­herbivore


Source: Agrawal, Anurag - Department of Ecology and Evolutionary Biology & Entomollogy, Cornell University


Collections: Environmental Sciences and Ecology