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Risk Assessment generated by a regulatory process
(RA)
published: 17 Dec 2008
last updated: 28 Mar 2013
Risk Assessment of herbicide tolerant cotton (MON1445)
EN
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Competent National Authority:National Technical Biosafety Commission ()Setor Policial Sul -SPO Área 5 Quadra 3 Bloco B - Térreo Salas 10 à 14Brasília, DF
CEP - 70610-200, BrazilPhone: (5561) 3411-5516,Fax: (5561) 3317-7475,Email: ctnbio@mct.gov.br,Website: http://www.ctnbio.gov.br,
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MON-Ø1445-2 - Roundup Ready™ cotton| Monsanto | Resistance to antibiotics (Kanamycin, Streptomycin), Resistance to herbicides (Glyphosate)
- National Biossecurity Comittiee [ English ]
- http://www.ctnbio.gov.br/index.php/content/view/12387.html [ Portuguese ]
The inserted gene cp4-epsps was obtained from a specific stretch of DNA of the Agrobacterium sp., CP4 strain, and codifies enzyme CP4-EPSPS (CP4 5-enolpyruvylshikimate-3-phosphate synthase) granting to cotton plants the attribute that enables the use, in post-emergence, of the glyphosate herbicide, for management of pest plants without injuring the cotton crop. Gene nptll codified the protein Neomycin Phosphotransferase type II that grants tolerance to antibiotics neomycin and kanamycin. Gene aad, which codifies protein AAD (3’(9)-O-aminoglycoside adenyltransferase – antibiotic resistance selection marker. Gene gox codifies enzyme GOX (glyphosate oxyreductase), responsible for metabolizing the glyphosate herbicide. Gene gox was not transferred to cotton and, consequently, the protein GOX was not detected in Roundup Ready Cotton Event MON1455. There is no evidence that the donor organisms of inserted genes are pathological to humans. Molecular and segregation analyses (Mendelian standard of 3:1) show that T-DNA was partially inserted in a single locus of the cotton genome. Genetic stability of MON 1445 was determined by hereditary stability standard, integrity of inserted DNA and stability phenotype in different environmental conditions determined in several generations of lineages obtained by retro-crossing with elite cultivars. This stability was additionally demonstrated by the integrity of inserted DNA and functionality of the protein CP4 EPSPS expressed in lineages obtained by crossing with a cultivar adapted for sowing in the Brazilian environment. Proteins EPSPS and NPTII, which have no history of toxicity or allergenicity, resulting from the expression of transgenes, showed to be equivalent to the ones present in nature. Gene epsps is present both in plants and in microorganisms, while nptll is present in several species of microorganisms, including intestinal bacteria and in genus Bacillus found in Brazilian soils. Studies in vitro demonstrated that in simulated intestinal fluids (pH 1.2 and pH 7.5) protein EPSPS is rapidly degraded, which is common in the digestive tract of mammals with proteins that pose a minimum risk of toxicity and allergenicity. Besides, studies of oral acute toxicity in mice showed that both EPSPS and NPTII fail to present toxic potential when orally administered at doses of 572mg/kg body weight and 5 mg/kg body weight, respectively. Both transgenic proteins, CP4 EPSPS and NPTII, are in the nature, widely distributed among microorganisms from where they are derived. The introgression of a transgene to wild cotton plants could only occur if a strong selective advantage was granted, higher than the disadvantages granted by the alleles that are genetically linked to the transgene. However, the herbicide-tolerant characteristic is recognized as being unable to grant receiving genotypes any adaptive advantage outside agricultural areas, since outside such areas the potentially receiving wild genotypes are not under the selective pressure from the herbicide and therefore any pollination of such genotypes would not result in genic introgression. Assessment of phenotypic and agronomic characteristics of Roundup Ready Cotton event MON 1445, cultivar DP50RR, conducted in Brazil reached results similar to the ones found in other regions of the world in experimental and commercial crops. Except for tolerance to the glyphosate herbicide, resulting from expression of gene cp4 epsps, Roundup Ready Cotton event MON 1445 demonstrates phenotype and agronomic characteristics equivalent to those of the standard conventional kindred lineages and commercial cultivars of conventional cotton. Glyphosate is a post-emergent herbicide, belonging to the chemical group of substituted glycines, classified as non-selective and possessing systemic action. It has a wide spectrum action, enabling the control of large and short-leaved annual and perennial weeds
EN
Long experience with traditional plant improvement techniques, over three decades of experience in research and over one decade of marketing transgenic varieties over the world, in addition to knowledge advancements in the structure and dynamics of genomes, indicating whether a certain gene or characteristic is safe, give a sign that the genetic engineering process, by its own, leaves little room for appearance of unexpected consequences that would not be identified or eliminated during the process of development of commercial GM varieties(14).
Whereas Roundup Ready Cotton Event MON 1445 belongs to a well characterized species (Gossypium hirsutum) with a solid background of safety for human use and that the cp4 epsps gene introduced in this variety does not codify a toxic protein, being harmless to humans.
Whereas the genic construct used to insert the gene in cotton resulted in a stable insertion of a functional copy of the cp4 epsps gene, granting the plants tolerance to glyphosate.
Whereas:
1. Roundup Ready Cotton Event MON 1445 displays genetic stability in different environmental conditions determined in a number of generations of lineages obtained by retrocrossing with elite cultivars, including a variety adapted for cultivation in Brazil.
2. Proteins CP4 EPSPS and NPTII were expressed in different tissues and development phases of Roundup Ready Cotton Event MON 1445 in extremely low levels.
3. Security assessments of Roundup Ready Cotton Event MON 1445 and its products ensured that the genetically modified variety is safe for both the environment and use as food or food component for animals when compared to the risk posed by conventional cotton.
4. The new proteins expressed in the plants, CP4 EPSPS and NPTII revealed to be safe in all aspects studied.
5. Protein CP4 EPSPS is rapidly degraded in the gastrointestinal system of humans and animals for being a labile enzyme; and, in addition, its way of action, specificity and absence of homology with toxic sequences make this protein not risky to human health and to the environment.
6. Protein NPTII was assessed by the FDA in 1994 and was found safe for use in food. It is rapidly degraded in the human gastrointestinal system and its mode of action, specificity and absence of homology with toxic sequences lead to the conclusion that the protein is not a toxic risk.
7. Potential allergenicity assessment studies verified that proteins CP4 EPSPS and NPTII are not detectable in cotton products used as human and animal food and do not pose significant risk as allergenic and are not derived from allergenic forms.
8. Phenotypic and agronomic characteristic studies of Roundup Ready Cotton Event MON 1445 cultivar DP50RR conducted in Brazil have reached results comparable with experimental and commercial farming studies conducted in other regions of the world.
9. Field and farm experiments conducted with a number of generations and derivatives of Roundup Ready Cotton Event MON 1445 since 1993 show a stable phenotype of glyphosate tolerance occurring as a monogenic characteristic of high inheritability that is little affected by the environment in its expression.
10. Studies with animals show that a paste made of Roundup Ready Cotton Event MON 1445 kernels is as safe and nutritive as a paste of conventional cotton kernel.
11. It is little likely that wild animals feed on significant amounts of seeds or other parts of the cotton plant.
12. Protein EPSPS is present in all plants and also in bacteria, algae and fungi, being therefore widely distributed in nature. For this reason, all living beings that feed on plants and microorganisms are already exposed to EPSPS proteins.
13. The antibiotics neomycin and kanamycin are not used in agriculture to control plant diseases originated from the soil. Therefore, it is not likely that the presence of the NPTII protein in the soil may affect the microbial population of the soil.
14. The transfer of the herbicide-tolerant characteristic to outside agriculture areas is extremely unlikely.
15. It is unlikely that the MON 1445 event transgene cp4 epsps be transferred to weeds, making them more invasive. The customary care with management of culture and herbicides, such as rotation of cultures and rotation of herbicides with different action mechanisms shall be the focus to mitigate the appearance of herbicide-tolerant plants.
16. Data submitted, in addition to those existing in the literature, show that the impacts generated by the release in commercial scale to the field of the cotton event MON 1445 are similar to those presented by its kindred and other non-GM varieties currently cultivated in Brazil.
17. Event MON 1445 has already been approved by several countries, including U.S.A., Canada, Japan, Australia, Mexico, South Africa, Argentina, China, European Union, Philippines, Colombia and South Korea and has been cultivated in some of these countries without negative effects to human and animal health and to the environment.
EN
Whereas Roundup Ready Cotton Event MON 1445 belongs to a well characterized species (Gossypium hirsutum) with a solid background of safety for human use and that the cp4 epsps gene introduced in this variety does not codify a toxic protein, being harmless to humans.
Whereas the genic construct used to insert the gene in cotton resulted in a stable insertion of a functional copy of the cp4 epsps gene, granting the plants tolerance to glyphosate.
Whereas:
1. Roundup Ready Cotton Event MON 1445 displays genetic stability in different environmental conditions determined in a number of generations of lineages obtained by retrocrossing with elite cultivars, including a variety adapted for cultivation in Brazil.
2. Proteins CP4 EPSPS and NPTII were expressed in different tissues and development phases of Roundup Ready Cotton Event MON 1445 in extremely low levels.
3. Security assessments of Roundup Ready Cotton Event MON 1445 and its products ensured that the genetically modified variety is safe for both the environment and use as food or food component for animals when compared to the risk posed by conventional cotton.
4. The new proteins expressed in the plants, CP4 EPSPS and NPTII revealed to be safe in all aspects studied.
5. Protein CP4 EPSPS is rapidly degraded in the gastrointestinal system of humans and animals for being a labile enzyme; and, in addition, its way of action, specificity and absence of homology with toxic sequences make this protein not risky to human health and to the environment.
6. Protein NPTII was assessed by the FDA in 1994 and was found safe for use in food. It is rapidly degraded in the human gastrointestinal system and its mode of action, specificity and absence of homology with toxic sequences lead to the conclusion that the protein is not a toxic risk.
7. Potential allergenicity assessment studies verified that proteins CP4 EPSPS and NPTII are not detectable in cotton products used as human and animal food and do not pose significant risk as allergenic and are not derived from allergenic forms.
8. Phenotypic and agronomic characteristic studies of Roundup Ready Cotton Event MON 1445 cultivar DP50RR conducted in Brazil have reached results comparable with experimental and commercial farming studies conducted in other regions of the world.
9. Field and farm experiments conducted with a number of generations and derivatives of Roundup Ready Cotton Event MON 1445 since 1993 show a stable phenotype of glyphosate tolerance occurring as a monogenic characteristic of high inheritability that is little affected by the environment in its expression.
10. Studies with animals show that a paste made of Roundup Ready Cotton Event MON 1445 kernels is as safe and nutritive as a paste of conventional cotton kernel.
11. It is little likely that wild animals feed on significant amounts of seeds or other parts of the cotton plant.
12. Protein EPSPS is present in all plants and also in bacteria, algae and fungi, being therefore widely distributed in nature. For this reason, all living beings that feed on plants and microorganisms are already exposed to EPSPS proteins.
13. The antibiotics neomycin and kanamycin are not used in agriculture to control plant diseases originated from the soil. Therefore, it is not likely that the presence of the NPTII protein in the soil may affect the microbial population of the soil.
14. The transfer of the herbicide-tolerant characteristic to outside agriculture areas is extremely unlikely.
15. It is unlikely that the MON 1445 event transgene cp4 epsps be transferred to weeds, making them more invasive. The customary care with management of culture and herbicides, such as rotation of cultures and rotation of herbicides with different action mechanisms shall be the focus to mitigate the appearance of herbicide-tolerant plants.
16. Data submitted, in addition to those existing in the literature, show that the impacts generated by the release in commercial scale to the field of the cotton event MON 1445 are similar to those presented by its kindred and other non-GM varieties currently cultivated in Brazil.
17. Event MON 1445 has already been approved by several countries, including U.S.A., Canada, Japan, Australia, Mexico, South Africa, Argentina, China, European Union, Philippines, Colombia and South Korea and has been cultivated in some of these countries without negative effects to human and animal health and to the environment.
not applicable
EN
Technical opinions related to agronomic performance reached a conclusion that there is equivalence between transgenic and conventional plants. This way the information indicates that transgenic plants are not fundamentally different from the non-transformed cotton genotypes, except for the tolerance to glyphosate. In addition there is no evidence of adverse reactions to the use of Roundup Ready Cotton Event MON 1445. For the above reasons, there is no restriction to the use of this cotton and derivatives in human and animal food.
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As established by Article 11 of Law no. 11,460, of March 21, 2007 “research and cultivation of genetically modified organisms may not be conducted in indigenous lands and areas of conservation units.”
EN
not applicable
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The cotton plant (G. hirsutum) has not shown itself with any invading potential in Brazil, as well as in other parts of the world where it is regularly cultivated in large scale. At the side of highways where corn kernels are transported together with other cotton products, plants may appear that establish themselves only in places where there is, either naturally or otherwise, accumulated humidity. There is not observable, however, any advance of such plants towards other areas. Besides, within the Gossypium genus, there are no records of potential as an invading plant, except for the G. tomentosum, that does not exist in Brazil
EN
molecular traditional methods
EN
EN
- Comissão Técnica Nacional de Biossegurança [ Portuguese ]
- National Technical Biosafety Comission [ English ]
| Record type | Field | Record(s) | |
|---|---|---|---|
| Country's Decision or any other Communication | Risk assessment | 1 | |