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Genetic pollution

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Genetic pollution is undesirable and uncontrolled [1][2] gene flow into indigenous populations, such as through immigration. [citation needed]

Usage

Invasive species

While in the field of agriculture, agroforestry and animal husbandry genetic pollution is being used to describe the undesirable gene flow between GE species and wild relatives;[5] conservation biologists and conservationists have from long before been using the term to describe the undesirable gene flow from domestic, feral, non-native and invasive species into indigenous species.[1][3][4] For example, TRAFFIC is the international wildlife trade monitoring network which works to ensure that trade in wild plants and animals is not a threat to the conservation of nature. They promote the awareness of the harmful effects of introduced invasive species that may "hybridize with native species, causing genetic pollution".[7] The Joint Nature Conservation Committee (JNCC) is the statutory adviser to the Government of United Kingdom and international nature conservation. Its work contributes to maintaining and enriching biological diversity and educating about the harmful effects of the introduction of invasive/non-native species. In this context they have advised that invasive species:

"will alter the genetic pool (a process called genetic pollution), which is an irreversible change.”[8]

Effect upon endangered species

Compromise of certain wild plant or animal endangered species may have particular significance in the case of these relatively small populations of threatened taxa. As an example the endangered African wild dog has its conservation status undermined not only by loss of habitat, but also by admixture of gene flow from domesticated canids that interbreed with the wild species.[9]

Genetic engineering

An early use of the term genetic pollution in this later sense appears in a wide-ranging review of the potential ecological risks from genetic engineering in The Ecologist magazine in July 1989. It was also popularized by environmentalist Jeremy Rifkin in his 1998 book The Biotech Century.[10] While intentional crossbreeding between two genetically distinct varieties is described as hybridization with the subsequent introgression of genes, Rifkin, who had played a leading role in the ethical debate for over a decade before, used genetic pollution to describe the risks that might occur due the unintentional process of genetically modified organisms (GMOs) dispersing their genes into the natural environment by breeding with wild plants or animals.[5][11][12]

The usage of genetic pollution by the Food and Agriculture Organization of the United Nations (FAO) is currently defined as:

“Uncontrolled spread of genetic information (frequently referring to transgenes) into the genomes of organisms in which such genes are not present in nature.”[13]

Since 2005 exist a GM Contamination Register, launched for GeneWatch UK and Greenpeace International and, it record all incidents intentional or accidental[14][15] release of genetically modified (GM) organisms.[16]

In a 10 year study of four different crops, none of the genetically modified plants were found to be more invasive or more persistent than their conventional counterparts.[17] An often cited example of genetic pollution is the reputed discovery of transgenes from GE maize in landraces of maize in Oaxaca, Mexico. The report from Quist and Chapela,[18] has since been discredited on methodological grounds.[19] The scientific journal that originally published the study concluded that "the evidence available is not sufficient to justify the publication of the original paper." [20] More recent attempts to replicate the original studies have concluded that genetically modified corn is absent from southern Mexico in 2003 and 2004.[21] The goal of genetic engineering crop plants to help advance tenability and condition of the world food supply has been a conflict with public and health concerns raised about the safety of the food from the end product.[22]

A 2004 study performed near an Oregon field trial for a genetically modified variety of creeping bentgrass (Agrostis stolonifera) revealed that the transgene and its associate trait (resistance to the glyphosate herbicide) could be transmitted by wind pollination to resident plants of different Agrostis species, up to 14 km from the test field.[23] In 2007, the Scotts Company, producer of the genetically modified bentgrass, agreed to pay a civil penalty of $500,000 to the United States Department of Agriculture (USDA). The USDA alleged that Scotts "failed to conduct a 2003 Oregon field trial in a manner which ensured that neither glyphosate-tolerant creeping bentgrass nor its offspring would persist in the environment".[24]

Controversial term

Whether genetic pollution or similar terms, such as “genetic deterioration”, “genetic swamping”, “genetic takeover” and “genetic aggression”, are an appropriate scientific description of the biology of invasive species is debated. Hymer and Simberloff argue that these types of terms:

"...imply either that hybrids are less fit than the parentals, which need not be the case, or that there is an inherent value in “pure” gene pools".[25]

They recommend that gene flow from invasive species be termed genetic mixing since:

“ "Mixing" need not be value-laden, and we use it here to denote mixing of gene pools whether or not associated with a decline in fitness".[25]

Environmentalists such as Patrick Moore, an ex-member and cofounder of Greenpeace, questions if the term genetic pollution is more political than scientific.The term is considered to arouse emotional feelings towards the subject matter.[26] In an interview he comments:

"If you take a term used quite frequently these days, the term “genetic pollution,” otherwise referred to as genetic contamination, it is a propaganda term, not a technical or scientific term. Pollution and contamination are both value judgments. By using the word “genetic” it gives the public the impression that they are talking about something scientific or technical--as if there were such a thing as genes that amount to pollution."[27]

See also

References

  1. ^ a b c ITALY'S WILD DOGS WINNING DARWINIAN BATTLE, By PHILIP M. BOFFEY, Published: December 13, 1983, THE NEW YORK TIMES. Accessed 27 November 2009: “Although wolves and dogs have always lived in close contact in Italy and have presumably mated in the past, the newly worrisome element, in Dr. Boitani's opinion, is the increasing disparity in numbers, which suggests that interbreeding will become fairly common. As a result, genetic pollution of the wolf gene pool might reach irreversible levels, he warned. By hybridization, dogs can easily absorb the wolf genes and destroy the wolf, as it is, he said. The wolf might survive as a more doglike animal, better adapted to living close to people, he said, but it would not be what we today call a wolf.”
  2. ^ Norman C. Ellstrand, 2001. "When Transgenes Wander, Should We Worry?" Plant Physiol, Vol.125, pp.1543-1545
  3. ^ a b Potts B. M., Barbour R. C., Hingston A. B., Vaillancourt R. E. (2003) Corrigendum to: TURNER REVIEW No. 6 Genetic pollution of native eucalypt gene pools—identifying the risks. Australian Journal of Botany 51, 333–333. doi:10.1071/BT02035_CO
  4. ^ a b Butler D. (1994). Bid to protect wolves from genetic pollution. Nature 370: 497 doi:10.1038/370497a0
  5. ^ a b c Gene flow from GM to non-GM populations in the crop, forestry, animal and fishery sectors, Background document to Conference 7: May 31 - July 6, 2002; Electronic Forum on Biotechnology in Food and Agriculture, Food and Agriculture Organization of the United Nations (FAO)
  6. ^ GE agriculture and genetic pollution web article hosted by Greenpeace.org
  7. ^ When is wildlife trade a problem? hosted by TRAFFIC.org, the wildlife trade monitoring network, a joint programme of WWF and IUCN - The World Conservation Union. Accessed on November 25, 2007
    “Invasive species have been a major cause of extinction throughout the world in the past few hundred years. Some of them prey on native wildlife, compete with it for resources, or spread disease, while others may hybridize with native species, causing “genetic pollution". In these ways, invasive species are as big a threat to the balance of nature as the direct overexploitation by humans of some species.”
  8. ^ Effects of the introduction of invasive/non-native species - Joint Nature Conservation Committee (JNCC), a statutory adviser to Government on UK and international nature conservation. Accessed on November 25, 2007.
    “Occasionally non-native species can reproduce with native species and produce hybrids, which will alter the genetic pool (a process called genetic pollution), which is an irreversible change.”
  9. ^ C. Michael Hogan. 2010. Alien species topic ed. Mark Mcginley; ed-in-chief Cutler Cleveland, NCSE, Washington DC
  10. ^ Jeremy Rifkin (1998) The Biotech Century: Harnessing the Gene and Remaking the World, published by J P Tarcher, ISBN 0-87477-909-X
  11. ^ Michael Quinion “Genetic Pollution” – World Wide Words
  12. ^ Amy Otchet (1998) Jeremy Rifkin: fears of a brave new world an interview hosted by The United Nations Educational, Scientific and Cultural Organization (UNESCO)
    Will wars be fought for the control of genes in the 21st century? Jeremy Rifkin fears the worst and explains why
  13. ^ A. Zaid, H.G. Hughes, E. Porceddu, F. Nicholas (2001) Glossary of Biotechnology for Food and Agriculture - A Revised and Augmented Edition of the Glossary of Biotechnology and Genetic Engineering. A FAO Research and Technology Paper ISSN 1020-0541. Food and Agriculture Organization of the United Nations. ISBN 92-5-104683-2. Accessed on November 24, 2007 Archived 2007-10-26 at the Wayback Machine
  14. ^ http://archive.greenpeace.org/pressreleases/geneng/2001may11.html ILLEGAL GENETICALLY ENGINEERED CORN FROM MONSANTO DETECTED IN ARGENTINA
  15. ^ http://www.gmcontaminationregister.org/index.php?content=re_detail&gw_id=131&reg=cou.13&inc=0&con=0&cof=0&year=0&handle2_page= Brazil – Illegal Roundup Ready cotton grown on 16,000 hectares
  16. ^ GM Contamination Register
  17. ^ M. J. Crawley et al., Nature 409 682-3 2001
  18. ^ Quist, David; Chapela, IH (2001). "Transgenic DNA introgressed into traditional maize landraces in Oaxaca, Mexico". Nature. 414 (6863): 541–543. doi:10.1038/35107068. PMID 11734853.
  19. ^ Christou, Paul (2002). "No Credible Scientific Evidence is Presented to Support Claims that Transgenic DNA was Introgressed into Traditional Maize Landraces in Oaxaca, Mexico". Transgenic Research. 11 (1): 3–5. doi:10.1023/A:1013903300469.
  20. ^ Metz, Matthew; Fütterer, J (2002). "Biodiversity (Communications arising): Suspect evidence of transgenic contamination" (– Scholar search). Nature. 416 (6881): 600–601. doi:10.1038/nature738. PMID 11935144. {{cite journal}}: External link in |format= (help) [dead link]
  21. ^ S. Ortiz-Garcı´a et al. 2005, Absence of detectable transgenes in local landraces of maize in Oaxaca, Mexico (2003–2004) Proceedings of The National Academy of Sciences 102:p12338-12343 [1]
  22. ^ Anthony J. Conner, Jeane M.E. Jacobs, July 1999. Mutation Research/Genetic Toxicology and Environmental Mutagenesis, Vol.433, Issue 1-2, pp.223-234
  23. ^ L. Watrud et al. 2004, "Evidence for landscape-level, pollen-mediated gene flow from genetically modified creeping bentgrass with CP4 EPSPS as a marker", Proceedings of The National Academy of Sciences 101, p.14533.
  24. ^ http://www.usda.gov/wps/portal/usdahome?contentidonly=true&contentid=2007/11/0350.xml
  25. ^ a b Rhymer JM and Simberloff, D. (1996) Extinction by Hybridization and Introgression. Annual Review of Ecology and Systematics 27: 83-109 doi:10.1146/annurev.ecolsys.27.1.83
  26. ^ Greenpeace, "Say no to genetic pollution" (n.d.) http://www.greenpeace.org
  27. ^ What's Wrong with the Environmental Movement: an interview with Patrick Moore By: Competitive Enterprise Institute staff, Environment News 2004 published by The Heartland Institute.
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