Genetic engineering f examples 3 future gm crops

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Genetic Engineering F. Examples 3. Future GM crops SmartStax TM corn Pest resistant, herbicide tolerant Bt rice Pest resistant High omega-3 soybeans Enhanced nutrition RR Sugarbeets* Herbicide tolerant 2007: <10% of US 2009: 95% of US Blue roses Ornamental
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I. Genetic Engineering G. Benefits and Risks 1. Benefits Accelerated improvement of crop strains a. Elevated yields, either per plant or per acre Usually involves inserting growth factor Plants grow larger, faster or both Con – Accelerated growth may alter chemical composition Allergies, digestive problems, etc. b. Accelerated maturation process Increased yield per acre, more crops per year Con – Plants produce different compounds at different life stages Young plants tend to produce more irritants and toxins (self defense) Potential to cause digestive or allergic problems
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I. Genetic Engineering G. Benefits and Risks 1. Benefits c. Increased resistance to disease, pests, toxins Reduced losses Greater yield Reduced application of chemicals Con – Potential transfer of resistance genes to weedy plant species through pollination Less problematic in areas where crop plants don’t have wild relatives Con – Development of resistance in pests d. Increased longevity of harvested produce Resistance to spoilage Ex – Potato engineered with bacterial gene for antifungal properties Helps potatoes to stay in storage without rotting Con – Chemicals that resist decomposition likely to be more difficult to digest
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I. Genetic Engineering G. Benefits and Risks 1. Benefits e. Increased resistance to cultural extremes Ex – Insertion of Arctic flounder antifreeze protein genes into strawberry Confers greater frost resistance and better fruit
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