Genetics of resistance against defences of the host plantBarbarea vulgarisin a Danish flea beetle population
Open Access
- 22 August 2000
- journal article
- Published by The Royal Society in Proceedings Of The Royal Society B-Biological Sciences
- Vol. 267 (1453), 1663-1670
- https://doi.org/10.1098/rspb.2000.1193
Abstract
One essential aspect of the study of the evolution of host-plant use by insects is (variation in) its genetic basis. The genetic basis of the ability of a flea beetle (Phyllotreta nemorum) to use the crucifer Barbarea vulgaris ssp. arcuata (G type) as a host plant was studied in a Danish population (Kvaerkeby) occurring naturally on this atypical host plant. Evidence was found that this ability was determined by a single, major, autosomal gene, although the presence of genes at additional loci at lower frequencies could not be excluded. No evidence was found for sex-linked inheritance, which was common in a second population in Denmark (Ejby) using Barbarea as a host plant. All beetles in the Kvaerkeby sample were homozygous ‘resistant’ to Barbarea defence. After crossing resistant F1 offspring from pairs consisting of a field-collected beetle and a susceptible one amongst each other, genotyping the F2 (reared on radish) showed a 1:2:1 ratio of homozygous resistant, heterozygous and susceptible beetles. No evidence was found for a reduction in the viability of beetles that were homozygous resistant at the autosomal locus, in contrast to what had been found earlier for two backcrossed lines founded by beetles from Ejby. The results show that there is variation in the genetic basis of host-plant use across local populations and imply that population structure should form part of the study of the interaction between P.nemorum and its host plants.Keywords
This publication has 26 references indexed in Scilit:
- Gene flow and geographically structured coevolutionProceedings Of The Royal Society B-Biological Sciences, 1999
- The Raw Material for CoevolutionOikos, 1999
- Sex–linked inheritance of host–plant specialization in a polyphagous butterflyProceedings Of The Royal Society B-Biological Sciences, 1998
- Genetics of the ability of Phyllotreta nemorum larvae to survive in an atypical host plant, Barbarea vulgaris ssp. arcuataEntomologia Experimentalis et Applicata, 1997
- Intraspecific variability in adult flea beetle behaviour and larval performance on an atypical host plantEntomologia Experimentalis et Applicata, 1996
- Ecological Genetics and Host Adaptation in Herbivorous Insects: The Experimental Study of Evolution in Natural and Agricultural SystemsAnnual Review of Entomology, 1990
- Evolutionary ecology of the relationship between oviposition preference and performance of offspring in phytophagous insectsEntomologia Experimentalis et Applicata, 1988
- Genetic Variation in the Use of Resources by InsectsAnnual Review of Entomology, 1985
- The effect of genetic background on the fitness of diazinon resistance genotypes of the Australian sheep blowfly, Lucilia cuprinaHeredity, 1982
- HOST PLANT DISCRIMINATION WITHIN CRUCIFERAE: FEEDING RESPONSES OF FOUR LEAF BEETLES (COLEOPTERA: CHRYSOMELIDAE) TO GLUCOSINOLATES, CUCURBITACINS AND CARDENOLIDESEntomologia Experimentalis et Applicata, 1978