Open AccessApplication of the maximum threshold distances to reduce gene flow frequency in the coexistence between genetically modified (GM) and non‐GM maize
Author(s) -
Hu Ning,
Hu Jichao,
Jiang Xiaodong,
Xiao Wei,
Yao Kemin,
Li Liang,
Li Xinhai,
Pei Xinwu
Publication year - 2022
Publication title -
evolutionary applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.776
H-Index - 68
ISSN - 1752-4571
DOI - 10.1111/eva.13361
Subject(s) - gene flow , biology , genetically modified crops , genetically modified organism , crop , genetically modified maize , agronomy , sowing , microbiology and biotechnology , transgene , gene , genetic variation , genetics
Abstract On the coexistence of genetically modified (GM) and non‐GM maize, the isolation distance plays an important role in controlling the transgenic flow. In this study, maize gene flow model was used to quantify the MTD 0.1% and MTD 1% in the main maize‐planting regions of China; those were the maximum threshold distance for the gene flow frequency equal to or lower than 1% and 0.1%. The model showed that the extreme MTD 1% and MTD 0.1% were 187 and 548 m, respectively. The regions of northern China and the coastal plain, including Hainan crop winter‐season multiplication base, showed a significantly high risk for maize gene flow, while the west‐south of China was the largest low‐risk areas. Except for a few sites, the isolation distance of 500 m could yield a seed purity of better than 0.1% and meet the production needs of breeder seeds. The parameters of genetic competitiveness ( cp ) were introduced to assess the effects of hybrid compatibility between the donor and recipient. The results showed that hybrid incompatibility could minimize the risk. When cp = 0.05, MTD 1% and MTD 0.1% could be greatly reduced within 19 m and 75 m. These data were helpful to provide scientific data to set the isolation distance between GM and non‐GM maize and select the right place to produce the hybrid maize seeds.