Roundup Ready Cotton

Roundup, 13 38-39, 19 53, 8 2 Roundup/Glyphosate, 2 549t Roundup Ready cottons, 8 2 Roundup tolerance, engineering, 12 487-490... 

I 6 Genetically Modified Herbicide Resistant Crops 6.2.4.1 Roundup Ready Cotton... 

There are three commercially available herbicide resistant traits in cotton glyphosate resistance (Roundup Ready , RR), glufosinate resistance (Liberty Link , LL), and bromoxynil resistance (BXN ). In 2005, herbicide resistance traits were cultivated on over 80% of approximately 14 million total cotton acres in the United States (Fig. 6.1.3) [6]. This acreage represents a combination of herbicide resistance alone or stacked with other traits such as insect control traits. 

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. 

Fig. 6.2.5. Fie Id performance and tissue expression profiles of CP4-EPSPS in first- and second-generation Roundup Ready (RR) cotton. (A) Comparison of boll retention between RR Flex cotton-2 (right) and RR cotton-1 (left) treated with Roundup (2.5 kg-a.e. ha" ) at 4, 6, 10, and 14-node...

T. Witten, A. York, Yield and fruiting behavior of Roundup Ready Flex cotton in ten environments in 2001. Proceeding of Bdtmde Cotton Conference, Nashville, Tennessee,... 

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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