摘要:Identity preserving production and marketing (IPPM) systems are used extensively in theCanadian canola industry to segregate varieties with different traits from the commodity stream. Thispaper examines one use of identify preserved production and marketing systems for geneticallymodi.ed (GM) canola. A number of transgenic herbicide tolerant (HT) varieties have been approvedfor release in Canada since 1995 but delays in approval in other countries led the Canadian canolasector to use IPPM systems to segregate these varieties and direct them toward accepted markets. Thispaper looks at a number of systems developed for input-trait GM canola, with a focus on thegovernance mechanisms used. # 2001 Elsevier Science Inc. All rights reserved.