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19 results on '"Stojšin, Duška"'

8. Likelihood assessment for gene flow of transgenes from imported genetically modified soybean ( Glycine max (L.) Merr.) to wild soybean ( Glycine soja Seib. et Zucc.) in Japan as a component of environmental risk assessment

Author

Goto, Hidetoshi, McPherson, Marc A., Comstock, Bradley A., Stojšin, Duška, and Ohsawa, Ryo

Subjects
Glycine soja, Glycine max, exposure assessment, fungi, environmental risk assessment, food and beverages, gene flow, wild soybean, Research Paper, genetically modified crops
Abstract

Environmental risk assessment is required for genetically modified (GM) crops before their import into Japan. Annual roadside monitoring along transportation routes from ports to processing facilities for GM soybean (Glycine max (L.) Merr.) have been requested as a condition of import only approval because of lack of information on the likelihood of persistence of imported GM soybean for food, feed and processing and the potential for transfer of transgenes into wild soybean (Glycine soja Seib. et Zucc.) through gene flow under the Japanese environment. The survey of soybean seeds, plants and wild soybean populations were conducted along transportation routes from unloading ports to processing facilities that provided data to help quantify actual exposure. The survey indicated that the opportunities for co-existence and subsequent crossing between wild soybean populations and imported soybean are highly unlikely. Together the survey results and the comprehensive literature review demonstrated low exposure of imported GM soybean used for food, feed and processing in Japan. This evaluation of exposure level is not specific to particular GM soybean event but can apply to any GM soybean traits used for food, feed and processing if their weediness or invasiveness are the same as those of the conventional soybean.

Published
2017

10. Consistent Risk Assessment Outcomes from Agronomic Characterization of GE Maize in Diverse Regions and as Single‐Event and Stacked Products

Author

Clawson, Ernest L., primary, Perrett, Jamis J., additional, Cheng, Lulu, additional, Ahmad, Aqeel, additional, Stojšin, Duška, additional, McGowan, Yan, additional, Díaz, Oscar Heredia, additional, Asim, Muhammad, additional, Vertuan, Hallison, additional, Quddusi, Murtaza, additional, and Soares, Daniel J., additional

Published
2019
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12. Characterization of Natural and Simulated Herbivory on Wild Soybean (Glycine soja Seib. et Zucc.) for Use in Ecological Risk Assessment of Insect Protected Soybean

Author

Goto, Hidetoshi, primary, Shimada, Hiroshi, additional, Horak, Michael J., additional, Ahmad, Aqeel, additional, Baltazar, Baltazar M., additional, Perez, Tim, additional, McPherson, Marc A., additional, Stojšin, Duška, additional, Shimono, Ayako, additional, and Ohsawa, Ryo, additional

Published
2016
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13. Pollen-Mediated Gene Flow in Maize: Implications for Isolation Requirements and Coexistence in Mexico, the Center of Origin of Maize

Author

Peña, Leandro, Baltazar, Baltazar M., Castro Espinoza, Luciano, Espinoza Banda, Armando, De la Fuente Martínez, Juan Manuel, Garzón Tiznado, José Antonio, González García, Juvencio, Gutiérrez, Marco Antonio, Guzmán Rodríguez, José Luis, Heredia Díaz, Oscar, Horak, Michael J., Madueño Martínez, Jesús Ignacio, Schapaugh, Adam W., Stojšin, Duška, Uribe Montes, Hugo Raúl, Zavala García, Francisco, Peña, Leandro, Baltazar, Baltazar M., Castro Espinoza, Luciano, Espinoza Banda, Armando, De la Fuente Martínez, Juan Manuel, Garzón Tiznado, José Antonio, González García, Juvencio, Gutiérrez, Marco Antonio, Guzmán Rodríguez, José Luis, Heredia Díaz, Oscar, Horak, Michael J., Madueño Martínez, Jesús Ignacio, Schapaugh, Adam W., Stojšin, Duška, Uribe Montes, Hugo Raúl, and Zavala García, Francisco

Abstract

Mexico, the center of origin of maize (Zea mays L.), has taken actions to preserve the identity and diversity of maize landraces and wild relatives. Historically, spatial isolation has been used in seed production to maintain seed purity. Spatial isolation can also be a key component for a strategy to minimize pollen-mediated gene flow in Mexico between transgenic maize and sexually compatible plants of maize conventional hybrids, landraces, and wild relatives. The objective of this research was to generate field maize-to-maize outcrossing data to help guide coexistence discussions in Mexico. In this study, outcrossing rates were determined and modeled from eight locations in six northern states, which represent the most economically important areas for the cultivation of hybrid maize in Mexico. At each site, pollen source plots were planted with a yellow-kernel maize hybrid and surrounded by plots with a white-kernel conventional maize hybrid (pollen recipient) of the same maturity. Outcrossing rates were then quantified by assessing the number of yellow kernels harvested from white-kernel hybrid plots. The highest outcrossing values were observed near the pollen source (12.9% at 1 m distance). The outcrossing levels declined sharply to 4.6, 2.7, 1.4, 1.0, 0.9, 0.5, and 0.5% as the distance from the pollen source increased to 2, 4, 8, 12, 16, 20, and 25 m, respectively. At distances beyond 20 m outcrossing values at all locations were below 1%. These trends are consistent with studies conducted in other world regions. The results suggest that coexistence measures that have been implemented in other geographies, such as spatial isolation, would be successful in Mexico to minimize transgenic maize pollen flow to conventional maize hybrids, landraces and wild relatives.

Published
2015

14. Pollen-Mediated Gene Flow in Maize: Implications for Isolation Requirements and Coexistence in Mexico, the Center of Origin of Maize

Author

Baltazar, Baltazar M., primary, Castro Espinoza, Luciano, additional, Espinoza Banda, Armando, additional, de la Fuente Martínez, Juan Manuel, additional, Garzón Tiznado, José Antonio, additional, González García, Juvencio, additional, Gutiérrez, Marco Antonio, additional, Guzmán Rodríguez, José Luis, additional, Heredia Díaz, Oscar, additional, Horak, Michael J., additional, Madueño Martínez, Jesús Ignacio, additional, Schapaugh, Adam W., additional, Stojšin, Duška, additional, Uribe Montes, Hugo Raúl, additional, and Zavala García, Francisco, additional

Published
2015
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19. Likelihood assessment for gene flow of transgenes from imported genetically modified soybean (Glycine max (L.) Merr.) to wild soybean (Glycine soja Seib. et Zucc.) in Japan as a component of environmental risk assessment.

Author

Hidetoshi Goto, McPherson, Marc A., Comstock, Bradley A., Stojšin, Duška, and Ohsawa, Ryo

Subjects
*GENE flow in plants, *TRANSGENES, *CROP genetics, *SOYBEAN, *ENVIRONMENTAL risk assessment, *GENETICALLY modified foods
Abstract

Environmental risk assessment is required for genetically modified (GM) crops before their import into Japan. Annual roadside monitoring along transportation routes from ports to processing facilities for GM soybean (Glycine max (L.) Merr.) have been requested as a condition of import only approval because of lack of information on the likelihood of persistence of imported GM soybean for food, feed and processing and the potential for transfer of transgenes into wild soybean (Glycine soja Seib. et Zucc.) through gene flow under the Japanese environment. The survey of soybean seeds, plants and wild soybean populations were conducted along transportation routes from unloading ports to processing facilities that provided data to help quantify actual exposure. The survey indicated that the opportunities for co-existence and subsequent crossing between wild soybean populations and imported soybean are highly unlikely. Together the survey results and the comprehensive literature review demonstrated low exposure of imported GM soybean used for food, feed and processing in Japan. This evaluation of exposure level is not specific to particular GM soybean event but can apply to any GM soybean traits used for food, feed and processing if their weediness or invasiveness are the same as those of the conventional soybean. [ABSTRACT FROM AUTHOR]

Published
2017
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