A field study of pollen-mediated gene flow from Mediterranean GM rice to conventional rice and the red rice weed

Messeguer, Joaquima; Marfâ, Victòria; Catalá, M. M.; Guiderdoni, Emmanuel; Melé, Enric

doi:10.1023/b:molb.0000012285.39859.9d

Cited by 120 publications

(135 citation statements)

References 20 publications

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“…Several studies have demonstrated that pollen from rice cultivars can fertilize O. rufipogon Kuroda et al, 2005Wang et al, 2006) and weedy rice Gealy et al, 2003;Messeguer et al, 2004) under field conditions, and that the resulting hybrids are fertile. Hybridization rates among these taxa are generally low, in the range of 0.01 to 3%.…”

Section: Introductionmentioning

confidence: 99%

Shared flowering phenology, insect pests, and pathogens among wild, weedy, and cultivated rice in the Mekong Delta, Vietnam: implications for transgenic rice

Cohen

Arpaia

Lan

et al. 2008

Environ. Biosafety Res.

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Many varieties of transgenic rice are under development in countries where wild and weedy relatives co-occur with the crop. To evaluate possible risks associated with pollen-mediated transgene dispersal, we conducted a two-year survey in Vietnam to examine overlapping flowering periods of rice (Oryza sativa L.), weedy rice (O. sativa), and wild rice (O. rufipogon Griff.), all of which are inter-fertile. We surveyed populations in two regions of the Mekong Delta, northern and southern, and at three sites in each of three habitats per region: fresh water, saline water, and acid sulfate soil. Weedy rice frequently flowered simultaneously with neighboring cultivated rice plants. Flowering was more seasonal in wild rice and often peaked in November and December. Peak flowering times of wild rice overlapped with adjacent rice fields at all of the saline sites and half of the acid sulfate sites. The longer flowering season of wild rice ensured that crop-to-wild gene flow was possible in fresh water habitats as well. Our second objective was to determine whether wild and weedy rice populations are exposed to pests that could be targeted by future transgenes, which may then provide fitness benefits. These populations shared many pathogen and insect herbivore species with cultivated rice (leaffolder, locust, cricket, planthoppers, rice bug, stem borer, sheath blight, blast, bacterial leaf blight, and brown spot). Damage by leaffolders and locusts was the most frequently observed insect feeding damage on all three rice types. Indicator species analysis revealed that most of the insect herbivores were associated with particular habitats, demonstrating the importance of broad geographic sampling for transgenic rice risk assessment. These survey data and the strong likelihood of gene flow from cultivated rice suggest that further studies are needed to examine the effects of transgenic traits such as resistance to pests on the abundance of wild and weedy rice.

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Section: Introductionmentioning

confidence: 99%

Shared flowering phenology, insect pests, and pathogens among wild, weedy, and cultivated rice in the Mekong Delta, Vietnam: implications for transgenic rice

Cohen

Arpaia

Lan

et al. 2008

Environ. Biosafety Res.

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“…They estimated a maximum outcrossing frequency of 10.48% when transgenic Bt cotton was surrounded by non-Bt cotton. The Bt pollen dispersal frequency decreased to 0.08% as distance increased to 20 m. Varying outcrossing estimates (0%-2%) in Bt rice crop have also been reported (Jia, 2002;Messeguer et al, 2004) at different distances and methods (Bashir et al, 2004). The adjacent plantation of Bt and non-Bt rice cultivars resulted in higher pollenmediated transgene flow.…”

Section: Vertical and Horizontal Gene Flow From Transgenic Bt Cropsmentioning

confidence: 90%

Insect-resistant transgenic crops: retrospect and challenges

Bakhsh¹,

Khabbazi²,

Baloch³

et al. 2015

Turk J Agric For

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The advent of genetic engineering has revolutionized agriculture remarkably with the development of superior insect-resistant crop varieties harboring resistance against insect pests. Bacillus thuringiensis (Bt) has been used as a main source for insect-resistant genes. In addition to Bt endotoxins, various plant lectins and other non-Bt genes from different sources have also been introduced in crop plants of economic importance. The insect-resistant crops have made a huge economic impact worldwide since their commercial release. The cultivation of insect-resistant cultivars has resulted both in increased crop productivity and in decreased environmental pollution. Although insect-resistant crops have been allowed to be commercialized following proper biosafety guidelines and procedures, still these crops face many challenges in order to be fully adopted and accepted. The degradation kinetics of Bt proteins, horizontal and vertical gene flow, effects on nontarget insects or organisms, antibiotic resistance, and some other unintended effects have been noted and discussed. Although no concrete evidence regarding any significant hazard of genetically engineered crops has been presented so far, the debate still remains intense. Impartial and professionally competent regulatory mechanisms for the evaluation of insect-resistant and other transgenic crops must be fully functionalized. The first part of this review focuses the development of different insect-resistant crops and various strategies adapted to delay resistance development in insect pests, while the second part addresses the challenges and future prospects of insect-resistant crops.

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“…物, 也是应用转基因生物技术较早且较成功的作物 (Tyagi & Mohanty, 2000;Huang et al, 2002;Jia, 2004)。目前已经培育出了包含不同性状的转基因水稻品种 (Huang et al, 2002;Jia & Peng, 2002), 其中一些已经被释放到环境中进行环境安全和生产性实验 (Messeguer et al, 2001(Messeguer et al, , 2004Chen et al, 2004;Huang et al, 2005 …”

Section: 水稻(Oryza Sativa)是一种非常重要的粮食作unclassified

Effects of the invasive plant Spartina alterniflora on insect diversity in Jiuduansha wetlands in the Yangtze River Estuary

Gao¹,

Xiao-wei²,

Li³

et al. 2006

Biodiversity Science

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A field study of pollen-mediated gene flow from Mediterranean GM rice to conventional rice and the red rice weed

Cited by 120 publications

References 20 publications

Shared flowering phenology, insect pests, and pathogens among wild, weedy, and cultivated rice in the Mekong Delta, Vietnam: implications for transgenic rice

Shared flowering phenology, insect pests, and pathogens among wild, weedy, and cultivated rice in the Mekong Delta, Vietnam: implications for transgenic rice

Insect-resistant transgenic crops: retrospect and challenges

Effects of the invasive plant Spartina alterniflora on insect diversity in Jiuduansha wetlands in the Yangtze River Estuary

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