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Mode of inheritance and stability of resistance to Bacillus thuringiensis var kurstaki in a diamondback moth ( Plutella xylostella ) population from Malaysia
Author(s) -
Sayyed Ali H,
Ferre Juan,
Wright Denis J
Publication year - 2000
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/1526-4998(200009)56:9<743::aid-ps195>3.0.co;2-8
Subject(s) - plutella , diamondback moth , cry1ac , biology , bacillus thuringiensis , population , genetics , bruton's tyrosine kinase , botany , lepidoptera genitalia , genetically modified crops , gene , medicine , transgene , signal transduction , environmental health , tyrosine kinase , bacteria
Genetic inheritance of resistance to Bacillus thuringiensis var kurstaki (BTK) was examined in a diamondback moth ( Plutella xylostella ) population collected from the Melaka region of Malaysia. A BTK‐selected sub‐population (BTK‐SEL) which was more than 100‐fold resistant to BTK compared with a susceptible (ROTH) population of P xylostella was used with standard reciprocal crosses and back‐crosses between ROTH and BTK‐SEL. Logit regression analysis of F 1 reciprocal crosses indicated that BTK resistance was inherited as an incompletely recessive autosomal trait and controlled by a single locus. In contrast, other studies have shown that resistance to Cry1Ac is inherited as an incompletely dominant autosomal trait in a Cry1Ac‐selected sub‐population of the same Melaka population. The frequency of the allele responsible for resistance decreased without exposure to insecticide in the laboratory. © 2000 Society of Chemical Industry