This text, when originally posted November 29, 2000, erroneously read:

In Canada, three cultivars of herbicide-tolerant canola have been approved and commercially introduced. However, the cultivars tolerant to Pursuit (imazethapyr) or Liberty (bromoxynil) were derived by herbicide selection procedures, not genetic engineering. Only the RR canola is transgenic. The risk of gene flow is similar for all three cultivars, yet no herbicide-resistant weedy relatives have been reported where these tolerant cultivars are grown.

In fact, four systems of herbicide-tolerant canola are in use in Canada, with many cultivars of each registered:

AENews thanks Murray Hartman from the Government of Alberta, Canada, for this correction and additional information.