Roundup Ready canola

Canada cultivates 90% of the canola acres in North America and is the focus of this survey. The three primary commercial herbicide resistant traits in canola are glyphosate resistance (Roundup Ready , RR), glufosinate resistance (Liberty Link , LL), and imidazolinone resistance (Clearfield , CF). There are two other herbicide resistant traits that are used on a relatively small number of acres and these are bromoxynil resistance (BXN ) and triazine tolerance (TT). In 2004, herbicide resistant traits were grown on over 90% of the 12-13 million total canola acres in Canada (Fig. 6.1.5) [7, 8]. 

A major milestone occurred in 1996 with the commercial introduction of glyphosate resistant soybean [22]. Since then, the glyphosate resistant trait (Roundup Ready , RR) has been introduced into canola, cotton, com, alfalfa, sugar beet, and others. All RR crops thus far contain a glyphosate insensitive EPS PS derived either from the plant or bacteria. 

The class II EPSP synthase gene also called roundup ready gene induces tolerance to glyphosate. When introduced into soybeans, cotton, maize, canola, and the hke, these plants tolerate glyphosate. That means that gls hosate can be used to control weeds in these crop plants without damaging them, although it is originally a total herbicide that kills all plants. 

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