GEPHE SUMMARY
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Gephebase Gene
Entry Status
Published
GepheID
GP00002598
Main curator
Courtier
PHENOTYPIC CHANGE
Trait Category
Trait State in Taxon A
Plutella xylostella - sensitive
Trait State in Taxon B
Plutella xylostella - resistant
Ancestral State
Taxon A
Taxonomic Status
Taxon A
Latin Name
Common Name
diamondback moth
Synonyms
diamondback moth; cabbage moth; Plutella xylostella (Linnaeus, 1758); Putella xylostella
Rank
species
Lineage
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a; Pancrustacea; Hexapoda; Insecta; Dicondylia; Pterygota; Neoptera; Holometabola; Amphiesmenoptera; Lepidoptera; Glossata; Neolepidoptera; Heteroneura; Ditrysia; Yponomeutoidea; Plutellidae; Plutella
Parent
NCBI Taxonomy ID
is Taxon A an Infraspecies?
No
Taxon B
Latin Name
Common Name
diamondback moth
Synonyms
diamondback moth; cabbage moth; Plutella xylostella (Linnaeus, 1758); Putella xylostella
Rank
species
Lineage
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a; Pancrustacea; Hexapoda; Insecta; Dicondylia; Pterygota; Neoptera; Holometabola; Amphiesmenoptera; Lepidoptera; Glossata; Neolepidoptera; Heteroneura; Ditrysia; Yponomeutoidea; Plutellidae; Plutella
Parent
NCBI Taxonomy ID
is Taxon B an Infraspecies?
No
GENOTYPIC CHANGE
Generic Gene Name
Ace
Synonyms
AcChE; ace; ACE; ace-2; ache; AchE; AChE; CG17907; CHE; dAChE; dmAChE; DmAChE; Dmel\CG17907; Dm_ace; FBgn0000024; l(3)26; l(3)87Ed
String
Sequence Similarities
Belongs to the type-B carboxylesterase/lipase family.
GO - Molecular Function
GO:0042803 : protein homodimerization activity
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GO - Biological Process
GO:0006581 : acetylcholine catabolic process
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GO - Cellular Component
GO:0005886 : plasma membrane
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UniProtKB
Drosophila melanogaster
Drosophila melanogaster
Presumptive Null
Molecular Type
Aberration Type
SNP Coding Change
Nonsynonymous
Molecular Details of the Mutation
A441G
Experimental Evidence
Taxon A | Taxon B | Position | |
---|---|---|---|
Codon | - | - | - |
Amino-acid | Gly | Ala | 324 |
Main Reference
Authors
Zhang LJ; Jing YP; Li XH; Li CW; Bourguet D; Wu G
Abstract
Alleles conferring a higher adaptive value in one environment may have a detrimental impact on fitness in another environment. Alleles conferring resistance to pesticides and drugs provide textbook examples of this trade-off as, in addition to conferring resistance to these molecules, they frequently decrease fitness in pesticide/drug-free environments. We show here that resistance to chlorpyrifos, an organophosphate (OP), in Chinese populations of the diamondback moth, Plutella xylostella, is conferred by two mutations of ace1 - the gene encoding the acetylcholinesterase enzyme targeted by OPs - affecting the amino acid sequence of the corresponding protein. These mutations were always linked, consistent with the segregation of a single resistance allele, ace1R, carrying both mutations, in the populations studied. We monitored the frequency of ace1R (by genotyping more than 20 000 adults) and the level of resistance (through bioassays on more than 50 000 individuals) over several generations. We found that the ace1R resistance allele was costly in the absence of insecticide and that this cost was likely recessive. This fitness costs involved a decrease in fecundity: females from resistant strains laid 20% fewer eggs, on average, than females from susceptible strains. Finally, we found that the fitness costs associated with the ace1R allele were greater at high temperatures. At least two life history traits were involved: longevity and fecundity. The relative longevity of resistant individuals was affected only at high temperatures and the relative fecundity of resistant females - which was already affected at temperatures optimal for development - decreased further at high temperatures. The implications of these findings for resistance management are discussed.
© 2015 John Wiley & Sons Ltd.
© 2015 John Wiley & Sons Ltd.
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