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Titolo:
MCE activities and malathion resistances in field populations of the Australian sheep blowfly (Lucilia cuprina)
Autore:
Smyth, KA; Boyce, TM; Russell, RJ; Oakeshott, JG;
Indirizzi:
CSIRO, Div Entomol, Canberra, ACT 2601, Australia CSIRO Canberra ACT Australia 2601 Entomol, Canberra, ACT 2601, Australia
Titolo Testata:
HEREDITY
fascicolo: 1, volume: 84, anno: 2000,
pagine: 63 - 72
SICI:
0018-067X(200001)84:1<63:MAAMRI>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
INSECTICIDE RESISTANCE; WIEDEMANN DIPTERA; CROSS-RESISTANCE; CARBOXYLESTERASE; CALLIPHORIDAE; SELECTION; ESTERASE; DIAZINON;
Keywords:
carboxylesterase; Diptera; genetic variation; malathion; organophosphate; resistance;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Smyth, KA Univ Texas, Inst Mol & Cellular Biol, Mol Biol Bldg,Mail Code A4800, Austin, TX 78712 USA Univ Texas Mol Biol Bldg,Mail Code A4800 Austin TX USA 78712 USA
Citazione:
K.A. Smyth et al., "MCE activities and malathion resistances in field populations of the Australian sheep blowfly (Lucilia cuprina)", HEREDITY, 84(1), 2000, pp. 63-72

Abstract

Malathion resistance has been shown to be the result of a single point mutation in the Lc alpha E7 gene in four independently isolated chromosomes ofLucilia cuprina. The resultant amino acid substitution specifies high malathion carboxylesterase (MCE) activity. We have assayed MCE activities and resistance to malathion in three sets of field-derived samples, two sets of isogenic lines and five mass populations, and show that resistance to malathion in these samples is associated with high MCE activity in both sets of isogenic lines and four of the five mass populations. Additional mechanismscontributing to MCE activity or malathion resistance may be present in oneof the mass populations. A second point mutation in Lc alpha E7 is responsible for conferring diazinon resistance by encoding an increased organophosphate (OP) hydrolase activity. We also assayed diazinon resistances from the same three samples and show that diazinon and malathion resistances were in complete disequilibrium, with two exceptions. One exception involves themass population with additional resistance mechanism(s) and the other involves three isogenic lines that are resistant to both insecticides. The molecular data for these lines suggest that they carry a duplication of the Lc alpha E7 gene.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 12/07/20 alle ore 06:25:07