Premium
Selection for Cry1F resistance in the European corn borer and cross‐resistance to other Cry toxins
Author(s) -
Pereira Eliseu J.G.,
Lang Bruce A.,
Storer Nicholas P.,
Siegfried Blair D.
Publication year - 2008
Publication title -
entomologia experimentalis et applicata
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.765
H-Index - 83
eISSN - 1570-7458
pISSN - 0013-8703
DOI - 10.1111/j.1570-7458.2007.00642.x
Subject(s) - ostrinia , crambidae , european corn borer , bacillus thuringiensis , biology , cry1ac , pyralidae , lepidoptera genitalia , genetically modified maize , poaceae , helicoverpa zea , agronomy , crop , ostrinia furnacalis , pesticide resistance , genetically modified crops , botany , noctuidae , pesticide , transgene , bacteria , gene , genetics , biochemistry
Evolution of resistance by insect pests is the greatest threat to the continued success of Bacillus thuringiensis (Bt) toxins used in insecticide formulations or expressed by transgenic crop plants such as Cry1F‐expressing maize [( Zea mays L.) (Poaceae)]. A strain of European corn borer, Ostrinia nubilalis (Hübner) (Lepidoptera: Crambidae), obtained from field collections throughout the central US Corn Belt in 1996 was selected in the laboratory for resistance to Cry1F by exposure to the toxin incorporated into artificial diet. The selected strain developed more than 3000‐fold resistance to Cry1F after 35 generations of selection and readily consumed Cry1F expressing maize tissue; yet, it was as susceptible to Cry1Ab and Cry9C as the unselected control strain. Only a low level of cross‐resistance (seven‐fold) to Cry1Ac was observed. These lacks of cross‐resistance between Cry1F and Cry1Ab suggest that maize hybrids expressing these two toxins are likely to be compatible for resistance management of O. nubilalis .