Table of Contents
Are transgenic plants resistant to herbicide?
The term ‘herbicide-resistant crop’ (HRC) describes crops made resistant to herbicides by either transgene technology or by selection in cell or tissue culture for mutations that confer herbicide resistance. HRCs are also referred to as herbicide-tolerant crops.
What crops are resistant to herbicides?
Among the traits, herbicide resistance trait remained the most planted trait. In 2010, herbicide resistance crops: soybean, maize, canola, cotton, sugarbeet, and alfalfa accounted for 61% (or 89.3 million ha) of the global transgenic area (148 million ha).
What GMO crop is resistant to a specific herbicide?
Monsanto first introduced glyphosate-resistant soybean in 1996 and later introduced glyphosate-resistant corn in 1998. These crops, commonly called “Roundup Ready”, have become ubiquitous in American agriculture with 93% of soybeans, 82% of cotton, and 85% of corn planted engineered to be glyphosate resistant.
Are GMO crops resistant to herbicides?
Most commercially planted genetically modified (GM) crops are either herbicide-resistant (HR) or insect-resistant (IR), many carrying both traits. Based on recent data and experience, there are concerns that HR crops promote the further intensification of farming and may therefore increase pressure on biodiversity.
What are the three different strategies to develop herbicide tolerant transgenic plants?
Genetic engineering work to develop glyphosate resistant crops focused on three strategies: overproduction of EPSP synthase, introduction of a metabolic detoxification gene and introduction of an altered EPSP synthase enzyme with decreased affinity for glyphosate (Dill, 2005).
What are resistant crops?
Pest resistant GM crops (primarily cotton and maize), have been genetically modified so they are toxic to certain insects. They are often called Bt crops because the introduced genes were originally identified in a bacterial species called Bacillus thuringiensis.
Which of the following is herbicide-resistant gene?
Pectate lyase gene is well known for its role in herbicide resistance by controlling plant polysachharide composition which affects stress resistance (Liang et al., 2017).
Which approach is best for development of glyphosate herbicide resistant transgenic plant?
However, when glyphosate kills weeds in a field, it also damages the crops. Therefore, efforts to cultivate and promote glyphosate-resistant cotton varieties via genetic engineering technology are the most effective approaches for controlling glyphosate weeds in cotton fields.
How does herbicide resistance work in crops?
Herbicide resistance is the inherited ability of a plant to survive and reproduce following exposure to a dose of herbicide that would normally be lethal to the wild plant. Resistance happens with the repeated use of the same herbicide, or herbicides with similar modes of action on a weed population.
What are HR crops?
Certain agricultural plants, known as herbicide-resistant crops (HRCs), have been genetically engineered for resistance to specific chemical herbicides, notably glyphosate.