Stable Bacillus thuringiensis transgene introgression from Brassica napus to wild mustard B. juncea

Di, Cao; Stewart, C. Neal; Zheng, Ming‐Hua; Guan, Zhengjun; Tang, Zhen‐Xing; Wei, Wei; Ma, Keping

doi:10.1016/j.plantsci.2014.06.018

Cited by 15 publications

(23 citation statements)

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“…Many studies have been carried out to estimate crop–crop (e.g., oilseed B. juncea ) and crop–weed/wild (e.g., weedy B. juncea ) gene flow and introgression from transgenic rapeseed (Bing et al., ; Cao et al., ; Di et al., ; Frello et al., ; Jørgensen et al., ; Liu et al., ; Song et al., ; Wei & Darmency, ). However, studies involving a large number of B. juncea varieties to extensively estimate napus‐juncea gene flow or introgression are limited, which may hinder the effective biosafety management of coexisting GM and non‐GM Brassica crops due to the lack of relevant baseline data (Sausse, Colbach, Young, & Squire, ; Walklate, Hunt, Higson, & Sweet, ).…”

Section: Discussionmentioning

confidence: 99%

“…Brassica juncea L. (AABB, 2n = 36) is a species of mustard plant for which China is considered as the centre of origin for varietal differentiation, with abundant genetic diversity around Sichuan (Lu et al., ). On the other hand, wild B. juncea is a common weed in many parts of China (Cao et al., ). Due to a long history of natural evolution and artificial selection, B. juncea has differentiated into numerous types of varieties, with great variation in biology, genetics, morphology and usages.…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies have shown that transgenic B. napus could cross with cultivated B. juncea (Bing, Downey, & Rakow, ; Frello, Hansen, Jensen, & Jorgensen, ; Jørgensen, Andersen, Landbo, & Mikkelsen, ) and wild B. juncea (Cao et al., ; Di et al., ; Liu, Wei, Ma, & Darmency, ; Song, Wang, Zuo, Huang, & Qiang, ; Wei & Darmency, ), causing pollen‐mediated gene dispersal. However, the experimental scale of these studies was generally very small.…”

Section: Introductionmentioning

confidence: 99%

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Transgene introgression from Brassica napus to different varieties of Brassica juncea

Tang

Chen

et al. 2018

Plant Breeding

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Transgene introgression from transgenic rapeseed (Brassica napus) to different varieties of B. juncea was assessed in this study. Crossability between a transgenic rapeseed line Z7B10 (pollen donor) and 80 cultivars of 16 B. juncea varieties (including two wild accessions) was estimated by artificial pollination in a greenhouse. As a result, interspecific crossability between the transgenic Z7B10 line and the 80 B. juncea cultivars varied considerably, with seeds per flower from 0.00–10.67. Seed germination rates of the interspecific F1 hybrids ranged from 49.0%–89.3%. The estimated frequencies of natural gene flow from the transgenic Z7B10 line to 10 B. juncea cultivars with different uses in the experiment field varied from 0.08% to 0.93%. The natural F1 hybrids were highly sterile, with seeds per silique ranging from 0.27 to 1.03. In addition, seeds per flower of hybrid descendants varied from 0.02 to 0.22 when F1 hybrids were self‐pollinated, and those ranged from 0.03 to 0.30 when F1 hybrids were backcrossed with their corresponding B. juncea parents. Results of this study suggest a low level of transgene introgression from transgenic rapeseed to different B. juncea varieties, which provides a sound scientific basis for the safety management of coexisting transgenic B. napus and B. juncea varieties in China.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Transgene introgression from Brassica napus to different varieties of Brassica juncea

Tang

Chen

et al. 2018

Plant Breeding

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“…Those studies show that Brassica hybrids have highly variable fitness ( Devos et al ., 2009 ; Jørgensen et al ., 2009 ). Furthermore, several studies suggest that F 1 hybrids might have reduced fitness compared with later backcrosses ( Burke and Arnold, 2001 ; Snow et al ., 2010 ; Yang et al ., 2011 ) and fitness could bounce back in later generations towards that of the wild parent ( Liu et al ., 2013 ; Cao et al ., 2014 ). Therefore, our fitness estimates of Brassica hybrids are likely at the lower end of what might happen in reality.…”

Section: Discussionmentioning

confidence: 99%

“…Several studies into crop–wild hybrids have considered above-ground stages (e.g. Hooftman et al ., 2007 ; Vacher et al ., 2011 ; Yang et al ., 2011 ; Cao et al ., 2014 ), but none has included simultaneous measures of seed bank survival.…”

Section: Introductionmentioning

confidence: 99%

Seed bank dynamics govern persistence of Brassica hybrids in crop and natural habitats

et al. 2014

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Background and Aims Gene flow from crops to their wild relatives has the potential to alter population growth rates and demography of hybrid populations, especially when a new crop has been genetically modified (GM). This study introduces a comprehensive approach to assess this potential for altered population fitness, and uses a combination of demographic data in two habitat types and mathematical (matrix) models that include crop rotations and outcrossing between parental species.Methods Full life-cycle demographic rates, including seed bank survival, of non-GM Brassica rapa × B. napus F1 hybrids and their parent species were estimated from experiments in both agricultural and semi-natural habitats. Altered fitness potential was modelled using periodic matrices including crop rotations and outcrossing between parent species.Key Results The demographic vital rates (i.e. for major stage transitions) of the hybrid population were intermediate between or lower than both parental species. The population growth rate (λ) of hybrids indicated decreases in both habitat types, and in a semi-natural habitat hybrids became extinct at two sites. Elasticity analyses indicated that seed bank survival was the greatest contributor to λ. In agricultural habitats, hybrid populations were projected to decline, but with persistence times up to 20 years. The seed bank survival rate was the main driver determining persistence. It was found that λ of the hybrids was largely determined by parental seed bank survival and subsequent replenishment of the hybrid population through outcrossing of B. rapa with B. napus.Conclusions Hybrid persistence was found to be highly dependent on the seed bank, suggesting that targeting hybrid seed survival could be an important management option in controlling hybrid persistence. For local risk mitigation, an increased focus on the wild parent is suggested. Management actions, such as control of B. rapa, could indirectly reduce hybrid populations by blocking hybrid replenishment.

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Identifying sustainability assessment parameters for genetically engineered agrifoods

Wei,

Grieger,

Cummings

et al. 2023

Plants People Planet

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Societal Impact StatementA diverse portfolio of genetically engineered food crops, as well as animal livestock and fish, are currently being developed and commercialized. To ensure their contributions to long‐term sustainability, a broad range of environmental, health, ethical, and societal parameters should be used in their evaluations. This paper proposes a set of parameters to evaluate the sustainability of genetically engineered food and agriculture products and discusses mechanisms to improve their governance and oversight. With such holistic evaluations, genetic engineering applications that are deemed beneficial to sustainable agriculture could be identified in an effort to foster sustainability.SummaryTo achieve international sustainable development goals, food and agricultural production need to rely on sustainable and resilient practices. Traditional breeding as well as the use of new agricultural technologies, including genetic engineering and gene editing, have the potential to help achieve sustainable agrifood production. Although numerous oversight mechanisms exist to guarantee the secure and sustainable advancement and utilization of genetically engineered agrifoods, the majority of these mechanisms heavily depend on a narrow set of parameters to assess risks and safety concerning human health and nontarget organisms. However, a more comprehensive range of parameters should be considered to promote environmental and social sustainability in a more holistic manner. This Opinion article argues that to achieve a more sustainable agrifood production that relies on genetic engineering, governance systems related to new agrifood biotechnologies should incorporate a broader array of environmental, health, ethical, and societal factors to ensure their sustainability in the long‐term. To facilitate this process, we propose a set of parameters to help evaluate the sustainability of agrifoods that rely on genetic engineering. We then discuss major challenges and opportunities for formalizing sustainability parameters in US governance policy and decision‐making systems. Overall, this work contributes to further developing a more comprehensive assessment framework that aims to minimize potential risks and maximize potential benefits of agrifood biotechnology while also fostering sustainability.

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Stable Bacillus thuringiensis transgene introgression from Brassica napus to wild mustard B. juncea

Cited by 15 publications

References 34 publications

Transgene introgression from Brassica napus to different varieties of Brassica juncea

Transgene introgression from Brassica napus to different varieties of Brassica juncea

Seed bank dynamics govern persistence of Brassica hybrids in crop and natural habitats

Identifying sustainability assessment parameters for genetically engineered agrifoods

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