Inheritance of Cry1Ac resistance and associated biological traits in the cotton bollworm, Helicoverpa armigera (Lepidoptera: Noctuidae)

Journal of Invertebrate Pathology
Rupa NairGovind T Gujar

Abstract

The analysis of reciprocal genetic crosses between resistant Helicoverpa armigera strain (BH-R) (227.9-fold) with susceptible Vadodara (VA-S) strain showed dominance (h) of 0.65-0.89 and degree of dominance (D) of 0.299-0.782 suggesting Cry1Ac resistance as a semi-dominant trait. The D and h values of F(1) hybrids of female resistant parent were higher than female susceptible parent, showing maternally enhanced dominance of Cry1Ac resistance. The progeny of F(2) crosses, backcrosses of F(1) hybrid with resistant BH-R parent did not differ significantly in respect of mortality response with resistant parent except for backcross with female BH-R and male of F(1) (BH-RxVA-S) cross, suggesting dominant inheritance of Cry1Ac resistance. Evaluation of some biological attributes showed that larval and pupal periods of progenies of reciprocal F(1) crosses, backcrosses and F(2) crosses were either at par with resistant parent or lower than susceptible parent on treated diet (0.01 microg/g). The susceptible strain performed better in terms of pupation and adult formation than the resistant strain on untreated diet. In many backcrosses and F(2) crosses, Cry1Ac resistance favored emergence of more females than males on untreated diet. The ...Continue Reading

References

Oct 31, 2002·Journal of Economic Entomology·Bruce E TabashnikYves Carrière
Feb 24, 2004·Proceedings of the National Academy of Sciences of the United States of America·M Mahbubur RahmanOtto Schmidt
Jan 8, 2005·Nature Biotechnology·Sarah L BatesAnthony M Shelton
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Feb 9, 2008·Nature Biotechnology·Bruce E TabashnikYves Carriére
Dec 11, 2008·Annual Review of Entomology·Aaron J GassmannBruce E Tabashnik

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Citations

Jul 12, 2013·PloS One·Pascal CampagneJohnnie Van den Berg
Mar 24, 2017·Journal of Economic Entomology·B PetersonJ Van den Berg
Mar 26, 2013·Pest Management Science·John G OakeshottRobyn J Russell
Jul 6, 2017·Journal of Invertebrate Pathology·Binod AcharyaFangneng Huang

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