Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2020, Vol. 41 ›› Issue (5): 851-858.DOI: 10.3969/j.issn.1000-2561.2020.05.002

• Crop Culture and Nutrition, Genetic Breeding • Previous Articles     Next Articles

Using Screen Mesh to Control the Isolation Distance of Transgenic Maize Planted in Off-Season Reproduction Regions

TAN Yanhua,XIE Xiang,ZHOU Xia,YI Xiaoping,HUO Shanshan,ZHANG Lili,CAO Yang,ZHAO Hui,GUO Anping()   

  1. Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences / Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off-Season Reproduction Regions, Haikou, Hainan 571101, China
  • Received:2019-04-25 Revised:2019-09-05 Online:2020-05-25 Published:2020-06-15
  • Contact: GUO Anping


Screen mesh has been used as a physical barrier isolation material to control the pollen flow in agricultural production for a long time, but there has been little reliable experimental data for the application. A physical isolation facility using screen mesh to isolate transgenic maize from non-transgenic maize was studied for two seasons 2015 and 2016. and at two different planting areas in Hainan Island. Screen mesh with 250 mesh and height of 2.5 m above the height of transgenic maize was good enough to prevent pollen flow at a critical distance of 20-30 m, when the threshold valve of genetic drift rate was set as 0.1%, which greatly shortened the isolation distance stipulated by the safety control of GM maize, and this was quite beneficial for Off-Season breeding due to the dwindling agricultural land. The study is also applicable to the gene flow risk control of traditional crops in Off-Season breeding areas during seed production process.

Key words: screen mesh, transgenic maize, genetic drift, isolation control, Off-Season breeding

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