Heritability of tolerance to the Cry1Ab toxin of Bacillus thuringiensis in Chilo suppressalis (Lepidoptera: Crambidae)

• Author(s) / Creator(s)

  • Cohen, M. B.
  • Gould, F.
  • Alinia, F.

• Abstract: Heritability of Chilo suppressalis (Walker) tolerance to the Cry1Ab toxin of Bacillus thuringiensis Berliner was estimated using a half-sibling design. Artificial diet with and without Cry1Ab was infested with progenies of 20 males, each mated with 2 females, and mortality was scored 5 d after infestation. The progeny of each female was reared and scored separately. Mean mortality of the 20 families on the Cry1Ab diet was 46.5%. The effects of both male parent and of female parent within male parent were significant. Heritability was estimated to be 0.52, suggesting that a high proportion of phenotypic variation was because of genetic differences. Mortality on the Cry1Ab diet was not correlated with mortality on control diet, indicating that differences among families in tolerance to Cry1Ab were not attributable to differences in general fitness. Our results indicate that \"high dose\" Bt rice plants may be particularly important for Cry1Ab resistance management in C. suppressalis populations.

• Date created

  2000

• Subjects / Keywords

  • Bacillus thuringiensis
  • Insecticide resistance
  • Rice
  • Heritability
  • Chilo suppressalis

• Type of Item

  Article (Published)

• DOI

  https://doi.org/10.7939/R39P2W62Q

• License

  © 2000 Entomological Society of America. This article is the copyright property of the Entomological Society of America and may not be used for any commercial or other private purpose without specific written permission of the Entomological Society of America.