Genetics of pink bollworm Resistance to Bacillus thuringiensis toxin CrylAc

Yong Biao Liu, Bruce E. Tabashnik, Susan K. Meyer, Yves Carrière, Alan C. Bartlett

Research output: Contribution to journalArticle

59 Scopus citations

Abstract

Laboratory selection increased resistance of pink bollworm (Pectinophora gossypiella) to the Bacillus thuringiensis toxin CrylAc. Three selections with CrylAc in artificial diet increased resistance from a low level to >100-fold relative to a susceptible strain. We used artificial diet bioassays to test F1 hybrid progeny from reciprocal crosses between resistant and susceptible strains. The similarity between F1 progeny from the two reciprocal crosses indicates autosomal inheritance of resistance. The dominance of resistance to CrylAc depended on the concentration. Resistance was codominant at a low concentration of CrylAc, partially recessive at an intermediate concentration, and completely recessive at a high concentration. Comparison of the artificial diet results with previously reported results from greenhouse bioassays shows that the high concentration of CrylAc in bolls of transgenic cotton is essential for achieving functionally recessive inheritance of resistance.

Original languageEnglish (US)
Pages (from-to)248-252
Number of pages5
JournalJournal of economic entomology
Volume94
Issue number1
DOIs
StatePublished - Jan 1 2001

    Fingerprint

Keywords

  • Bacillus thuringiensis
  • CrylAc
  • Inheritance
  • Pectinophora gossypiella
  • Resistance management
  • Transgenic cotton

ASJC Scopus subject areas

  • Ecology
  • Insect Science

Cite this