文献类型： 外文期刊

作者： Zhang, Liping ¹ ; Huang, Fangneng ¹ ; Leonard, B. Rogers ¹ ; Chen, Mao ³ ; Clark, Thomas ³ ; Zhu, Yu Cheng ⁴ ; Wangila ¹ ;

作者机构： 1.Louisiana State Univ, Dept Entomol, Ctr Agr, Baton Rouge, LA 70803 USA

2.Shanxi Acad Agr Sci, Cotton Res Inst, Yuncheng, Shanxi, Peoples R China

3.Monsanto Co, Chesterfield, MO 63017 USA

4.USDA ARS, Jamie Whitten Delta States Res Ctr, Stoneville, MS 38776 USA

关键词： Diatraea saccharalis;Bacillus thuringiensis;Cross-resistance;Resistance management;Bt maize

期刊名称：JOURNAL OF INVERTEBRATE PATHOLOGY （ 影响因子：2.841； 五年影响因子：3.368 ）

ISSN： 0022-2011

年卷期： 2013 年 112 卷 3 期

页码：

收录情况： SCI

摘要： Sugarcane borer, Diatraea saccharalis (F.), is a major target of Bt maize in South America and many areas of the US mid-south region. Six laboratory strains of D. saccharalis were established from six single-pair F-2 families possessing major resistance alleles to Cry1Ab maize hybrids. Susceptibility of the six strains was evaluated on diet treated with each of four purified trypsin-activated Bt proteins, Cry1Ab, Cry1Aa, Cry1Ac and Cry1F. Bt susceptibility of the six strains was compared with that of known Cry1Ab-susceptible and -resistant strains of D. saccharalis. At least two of the six strains demonstrated a similar level (>526-fold) of resistance to Cry1Ab as shown in the known Cry1Ab-resistant strain, while resistance levels were relatively lower for other strains (116- to 129-fold). All the six strains were highly cross-resistant to Cry1Aa (71- to 292-fold) and Cry1Ac (30- to 248-fold), but only with a low level to Cry1F (<7-fold). Larval growth of all six strains was also inhibited on Bt-treated diet, but, except for Cry1F, the growth inhibition of the six strains was considerably less than that of the Cry1Ab-susceptible larvae. The results provide clear evidence that the observed resistance to Cry1Ab maize in the six strains is a result of resistance to the Cry1Ab protein in the plants. The low level of cross-resistance between Cry1A and Cry1F suggests that pyramiding these two types of Bt proteins into a plant could be a good strategy for managing D. saccharalis. (C) 2012 Elsevier Inc. All rights reserved.