文献类型： 外文期刊

作者： Zhang, Liping ¹ ; Leonard, B. Rogers ¹ ; Chen, Mao ³ ; Clark, Thomas ³ ; Anilkumar, Konasale ³ ; Huang, Fangneng ¹ ;

作者机构： 1.Louisiana State Univ, Ctr Agr, Dept Entomol, 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

关键词： Diatraea saccharalis;Bacillus thuringiensis;Zea mays;Resistance;Fitness;Stability

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： 2014 年 117 卷

页码：

收录情况： SCI

摘要： The sugarcane borer, Diatraea saccharalis (F.), is a major target species of transgenic corn expressing Bacillus thuringiensis (Bt) proteins in South America and the U.S. mid-south region. In this study, the fitness of seven insect genotypes of D. saccharalis were assayed on non-toxic diet, which included a Cry1Ab-susceptible strain (SS-2009), two Cry1Ab-resistant strains (RR-43A(BC), RR-L5B(BC)), and four F-1 hybrids (F-1-R43(m)S(f), F-1-R43A(f)S(m), F-1-R5B(m)S(f), and F-1-R5B(f)S(m)). The F1 hybrids were generated by reciprocal crosses of SS-2009 with RR-43A(BC) and RR-L5B(BC), respectively. Biological parameters measured were neonate-to-pupa survivorship, neonate-to-pupa development time, pupal mass, pupa-to-adult emergence rate, and progeny (neonates) production. The overall performance of the two resistant strains and the four F-1 genotypes was either similar or better than SS-2009 for all biological parameters measured, suggesting a lack of fitness costs associated with the Cry1Ab resistance traits in both RR-43A(BC) and RR-L5B(BC). In addition, resistance stability was evaluated by measuring the Cry1Ab susceptibility of RR-43A(BC) and RR-L5B(BC) in the absence of selection pressure. Laboratory bioassays showed that larval mortality of the two resistant strains did not significantly increase after selection pressure was removed for 16 generations across all Cry1Ab concentrations assayed. The results provide valuable information on assessing resistance risk and developing effective management strategies for the sustainable use of Bt corn technology. (C) 2014 Elsevier Inc. All rights reserved.