ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Comparison of fumonisin concentrations in kernels of transgenic Bt maize hybrids and nontransgenic hybrids.

MUNKVOLD, G.P., HELLMICH, R.L., and RICE, L.G.

Plant Disease 83: 130-138.

1999

บทคัดย่อ

Maize hybrids genetically engineered with genes from the bacterium Bacillus thuringiensis (Bt maize) express CryIA (b) and other. Cry proteins that are toxic to certain insects, particularyl the European comborer (Ostrinia nubilalis). In field experiments in 1995, 1996 and 1997, transgenic maize hybrids and near-isogenic, nontransgenic hybrids were manually infested with neonatal European corn borer larvae. Manual infestation increased Fusarium ear rot severity and fumonisin concentrations in kernels of nontransgenic  brids. Transgenic hybrids with  kernel expression of CryA (b) consistently experienced less insect feeding on kernels and less Fusarium ear rot than their nontransgenic counterparts and also exhibited lower concentrations of fumonisins in kernels. Transgenic hybrids not expressing CryA(b) or Cry9C in kernels did not consistently have fumonisin concentrations different from the nontransgenic hybrids.