Studies on gene flow from GM herbicide-tolerant rapeseed (B. napus) to other species of crucifers

摘要

Frequency of gene flow from transgenic herbicide-tolerant (THT) rapeseed (Brassica napus L) to cruciferae plants was estimated in open pollinated (OP) population and artificial hybridization by using the THT rapeseed cultivar Q3 and HCN-19 as pollen donors. Results showed that the rates of gene flow from THT rapeseed to B. oleracea, B. nigra,, B. carinata, B. juncea, B. campestris and B. napus, was 0%, 0.024%～0.243%, 0.028%～0.092%, 0.109%～0.951%, 0.479%～0.879%, 1.252～2.191% respectively. The frequency of gene flow from THT rapeseed to 7 cruciferae weeds was 0%. It indicates that no environmental risk could occurred for growing the THT rapeseed. However the frequency of gene flow from THT rapeseed to wild mustard (B. juncea) reached 0.885%. Owing to its wide spread in most of rapeseed production area in China and its various types, the wild mustard could be polluted easily in TNT rapeseed growing area. More attention should be paid to rapeseed for its herbicide-tolerant gene flow by pollen transmission from GM crops to its wild allies.