Quantitative genetics of preference and performance in the noctuid moth, Helicoverpa armigera

Cotter, S. C. and Edwards, O. R. (2006) Quantitative genetics of preference and performance in the noctuid moth, Helicoverpa armigera. Heredity, 96 (5). pp. 396-402. ISSN 1461-023X

Full content URL: http://dx.doi.org/10.1038/sj.hdy.6800819

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If a novel, resistant host plant genotype arises in the environment, insect populations utilising that host must be able to overcome that resistance in order that they can maintain their ability to feed on that host. The ability to evolve resistance to host-plant defences depends upon additive genetic variation in larval performance and adult host-choice preference. To investigate the potential of a generalist herbivore to respond to a novel resistant host we estimated the heritability of larval performance in the noctuid moth, Helicoverpa armigera, on a resistant and a susceptible variety of the chickpea, Cicer arietinum, at two different life-stages. Heritability estimates were higher for neonates than for third-instar larvae suggesting that their ability to establish on plants could be key to the evolution of resistance in this species, however further information regarding the nature of selection in the field would be required to confirm this prediction. There was no genetic correlation between larval performance and oviposition preference, indicating that female moths do not choose the most suitable plant for their offspring. We also found significant genotype by environment interactions for neonates (but not third-instar larvae), suggesting that the larval response to different plant genotypes is stage-specific in this species.

Additional Information:advance online publication, March 29, 2006
Keywords:biological control, genetic correlation, genotype by environment interaction, host plant resistance, insect, plant-insect interactions, oaopen
Subjects:C Biological Sciences > C360 Pest Science
C Biological Sciences > C182 Evolution
C Biological Sciences > C340 Entomology
C Biological Sciences > C150 Environmental Biology
C Biological Sciences > C120 Behavioural Biology
C Biological Sciences > C180 Ecology
D Veterinary Sciences, Agriculture and related subjects > D411 Agricultural Pests and Diseases
C Biological Sciences > C300 Zoology
C Biological Sciences > C100 Biology
Divisions:College of Science > School of Life Sciences
ID Code:15965
Deposited On:08 Nov 2014 17:42

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