Yield benefit and underlying cost of insect-resistance transgenic rice: Implication in breeding and deploying transgenic crops

Xia, Hui; Chen, Liangyan; Wang, Zhen; Lu, Bao‐Rong

doi:10.1016/j.fcr.2010.05.008

Cited by 53 publications

(58 citation statements)

References 24 publications

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“…Previous evaluation of the same Bt GE rice lines did not show any yield losses caused by the underlying fitness cost under different experimental designs (Huang et al 2008;Wang et al 2010). The above findings are not in accordance with reports from other studies in which some insect-resistant Bt GE rice lines showed various degrees of yield loss when ambient insect pressure was extremely low (Chen et al 2006;Kim et al 2008;Xia et al 2010), probably reflecting the underlying cost of the transgene(s). The discrepancy between these results clearly demonstrates a case-specific situation concerning the benefit and cost of different transgenes and transgenic events that influence the performances of GE crops.…”

Section: Discussioncontrasting

confidence: 76%

“…Previous studies have indicated that many insect-resistant GE rice lines can have significant yield benefits under insect attacks (Tu et al 2000;Chen et al 2006;Huang et al 2008;Wang et al 2010), in addition to their positive impacts on agricultural ecosystems and more environmentally friendly farming practices (Huang et al 2005(Huang et al , 2008. However, studies have also indicated the underlying fitness cost of some insect-resistant GE rice lines under insect-free or low-insect environmental conditions (Chen et al 2006;Kim et al 2008;Xia et al 2010), which might potentially lead to some degree of yield loss when ambient insect pests are scarce. In addition, it is also important to detect effects on yield of an insect-resistant GE crop caused by target and non-target insects in a well-designed field experiment.…”

Section: Introductionmentioning

confidence: 95%

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Enhanced yield performance of Bt rice under target-insect attacks: implications for field insect management

Xia

et al. 2010

Transgenic Res

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The rapid development of transgenic biotechnology has greatly promoted the breeding of genetically engineered (GE) rice in China, and many GE rice lines are in the pipeline for commercialization. To understand field performances of GE rice, key agronomic traits of two insect-resistant Bt rice lines that have been granted biosafety certificates for commercial production in China were evaluated together with their nontransgenic counterparts under environmental conditions with significant differences in insect pressure. Results from the experiments showed enhanced field performances of the Bt GE rice lines compared with the non-GE counterparts for yield-related traits such as number of panicles and filled seeds per plant, under environmental conditions with no insecticide application. No detectable underlying cost of the Bt transgene was observed in the two insect-resistant GE rice lines, particularly in the GE hybrid rice line. Results further indicated significantly greater yield performances of the two insect-resistant GE rice lines under environmental conditions with non-target insect control compared with no insect control. It is concluded from this study that insect-resistant Bt GE rice, particularly the hybrid line, has great potential to maintain its high yield when ambient insect pressure is high. In addition, proper application of insecticides to control non-target insects will guarantee optimal performance of insect-resistant Bt GE rice.

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Section: Discussioncontrasting

confidence: 76%

Section: Introductionmentioning

confidence: 95%

Enhanced yield performance of Bt rice under target-insect attacks: implications for field insect management

Xia

et al. 2010

Transgenic Res

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“…Moderate yield reduction (5%) has been observed in genetically modified herbicide-resistant crops (Elmore et al, 2001) without hampering their widespread use. Many fitness costs linked to diverse traits in genetically modified crops have been reported, but they could be because of overexpression, silencing or breakage of native genes (Xia et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Fitness costs linked to dinitroaniline resistance mutation in Setaria

Darmency¹,

Picard²,

Wang

2011

Heredity

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A mutant Thr-239-Ileu at the a2-tubulin gene was found to confer resistance to dinitroanilines, a family of mitosisdisrupting herbicides. However, mutations affecting microtubule polymerization and cell division are expected to impact growth and reproduction, that is, the fitness of a resistant weed or the yield of a tolerant crop, although it has not been demonstrated yet. This study was designed to test this hypothesis for the growth and reproduction of nearisogenic resistant and susceptible materials that were created in F 2 and F 3 generations after a Setaria viridis x S. italica cross. Differential growth was noticeable at the very onset of seedling growth. The homozygous resistant plants, grown both in a greenhouse cabinet and in the field, were smaller and had lower 1000-grain weight and therefore a lower yield. This fitness penalty is certainly due to modified cell division kinetics. Although the presence of the mutant allele accounted for 20% yield losses, there were also measurable benefits of dinitroaniline resistance, and these benefits are discussed.

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“…Other genes such as spider venom, agglutinin, snow drop lectin (GNA) have been used to confer resistance to leaf folder, striped stem borer, aphids and rice brown planthopper respectively (Qiu et al 2001;Khan et al 2006;Ye et al 2009a, b;Xiaofen et al 2001). Some reports provide detailed accounts on the economic, environmental and health benefits of various insect-resistant transgenic crops (James 2005;Ferry et al 2006;Rahman et al 2007;Gatehouse, 2008;Xia et al 2010).…”

Section: Introductionmentioning

confidence: 96%

Agrobacterium mediated transformation of indica rice (Oryza sativa L.) for insect resistance

Ignacimuthu¹,

Raveendar²

2010

Euphytica

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The rice leaffolder (RLF), Cnaphalocrocis medinalis is an important pest of rice that causes severe damage in many areas of the world. The plants were transformed with fully modified (plant codon optimized) synthetic Cry1C coding sequences as well as with the hpt and gus genes, coding for hygromycin phosphotransferase and b-glucuronidase, respectively. Cry1C sequences placed under the control of doubled 35S promoter plus the AMV leader sequence, and hpt and gus genes driven by cauliflower mosaic virus 35S promoter, were used in this study. Embryogenic calli after cocultivation with Agrobacterium were selected on the medium containing hygromycin B. A total of 67 hygromycinresistant plants were regenerated. PCR and Southern blot analyses of primary transformants revealed the stable integration of Cry1C coding sequences into the rice genome with predominant single copy integration. R 1 progeny plants disclosed a monogenic pattern (3:1) of transgene segregation as confirmed by molecular analyses. These transgenic lines were highly resistant to rice leaffolder (RLF), Cnaphalocrocis medinalis as revealed by insect bioassay.

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Yield benefit and underlying cost of insect-resistance transgenic rice: Implication in breeding and deploying transgenic crops

Cited by 53 publications

References 24 publications

Enhanced yield performance of Bt rice under target-insect attacks: implications for field insect management

Enhanced yield performance of Bt rice under target-insect attacks: implications for field insect management

Fitness costs linked to dinitroaniline resistance mutation in Setaria

Agrobacterium mediated transformation of indica rice (Oryza sativa L.) for insect resistance

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