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Today: Genetically Modified Plants(see textbook section 38.3)
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Human resource production and use
http://www.earth-policy.org/Indicators/Grain/2006.htm
World pop.= 6,914,330,387 as of 10:45pm on 4/24/11http://www.census.gov/main/www/popclock.html
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Worldwide Grain Production per Person
http://www.earth-policy.org/Indicators/Grain/2006.htm
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Land use in USA, 1997
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from Teosinte MaizeBy artificial selection that began ~10,000 years ago.
Fig 38.16
Artificial Selection
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Hunter-Gatherer
Agricultural
Industrial
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Genetic Engineering: Direct manipulation of DNA
Fig 20.2
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We can now insert new genes or modify existing genes of organisms
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Genetically modified plants
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Agrobacterium infect plants, inserting some of their DNA into the plants genome and forming a gall.
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Fig 20.25
Agrobacterium infect plants, inserting some of their DNA into the plants genome.
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After inserting a gene into the Agrobacteria, they will insert that gene into the plant's DNA.
Fig 20.25
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Global area planted with GM crops
http://www.gmo-compass.org/eng/agri_biotechnology/gmo_planting/257.global_gm_planting_2006.html
And http://www.monsanto.com.au/_images/global_area_chart.gif
Texas=70ha
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The agricultural release of genetically modified plants is the largest scale
experiment that has ever been performed.
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GM crops by country...
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Why Change a Plant’s DNA?
•Can change plant so that it has new or different characteristicsStress resistance (cold, drought, disease...)Insect resistance (Bt toxin)Herbicide resistance (Round-up)
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% of T
otal US
A
cres
Common GM Crops in the U.S.
http://blog.wired.com/
wiredscience/2007/09/
monsanto-is-hap.html
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Why Change a Plant’s DNA?
•Can change plant so that it has new or different characteristicsStress resistance (cold, drought, disease...)Insect resistance (Bt toxin)Herbicide resistance (Round-up)
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Have GMO's been beneficial, and what are the risks?
… It's complicated.
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more precise application vs unintended release
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Human impacts:
Dead zone in Gulf of
Mexico from
Mississippi River
http://blog.nola.com/times-picayune/2007/06/despite_promises_to_fix_it_the.html
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GM crops illegal
GM crops found in Oaxaca and other MX states
Genetic information moves, and is self-replicating.
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Pollen is easily transferred from plant to plant, and to related species.
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GM crops illegal
GM crops found in Oaxaca and other MX states
Genetic information moves.
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Toxins in transgenic crop byproducts may affect headwater stream ecosystems (2007)E. J. Rosi-Marshall, J. L. Tank, T. V. Royer, M. R. Whiles, M. Evans-White, C. Chambers, N. A. Griffiths, J. Pokelsek, M. L. Stephen PNAS 104:16204-16208
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Jennifer Tank (left) and Emma Rosi-Marshall study human-dominated ecosystems
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B. corn growing near a stream and C. corn detritus in/near a stream
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Fig. 3. Growth rates of the shredding caddisfly L. liba fed non-Bt and Bt corn leaves (P = 0.008, Student's t test)
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Can you own an idea?
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•Can you own an idea?
•Would you share your idea if others will profit from it?
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•Can you own an idea?
•Would you share your idea if others will profit from it?
•Would you accept someone else taking credit for your idea(s)?
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Patents give 20 year monopoly for inventor
www.uspto.gov
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Scientific Integrity: an Introductory Text with Cases, 2nd ed. (2000) Marcina, F. L. ASM Press, Washington, D.C.
Patentable inventions must be:•Useful•New or Novel–Non-obvious
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The patent application must include sufficient information for someone “practiced in the art” to apply the patent.
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Scientific Integrity: an Introductory Text with Cases, 2nd ed. (2000) Marcina, F. L. ASM Press, Washington, D.C.
Protection of intellectual property was guaranteed in the U.S. Constitution (1787).
The 1980 U.S. Supreme Court ruling (Diamond v. Chakrabarty) allowed patents for nonhuman life forms if there was human intervention in their creation.
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Examples of current patents:
•Atryn- antithrombin produced in transgenic goats (in milk) has anti-clotting properties
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Examples of current patents:
•Atryn- antithrombin produced in transgenic goats (in milk) has anti-clotting properties
•Evolutec has patents on proteins in tick saliva for use as anti-inflammatory
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Examples of current patents:
•Atryn- antithrombin produced in transgenic goats (in milk) has anti-clotting properties
•Evolutec has patents on proteins in tick saliva for use as anti-inflammator
•GTG in Australia has patents on non-coding human DNA for detecting risk of various diseases
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Neem, say the women, helps babies sleep, keeps flies away, is a cosmetic, a disinfectant and a pesticide. Its leaves make good cattle fodder, its twigs are good for teeth and gums. It is used, they say, for snake bites, malaria, hysteria, high blood pressure, pain relief, skin diseases and a host of other ailments.
Over 70 U.S. patents for use of Indian neem tree
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Neem, say the women, helps babies sleep, keeps flies away, is a cosmetic, a disinfectant and a pesticide. Its leaves make good cattle fodder, its twigs are good for teeth and gums. It is used, they say, for snake bites, malaria, hysteria, high blood pressure, pain relief, skin diseases and a host of other ailments.
Over 70 U.S. patents for use of Indian neem tree
One was rejected due to previous use in indigenous Indian culture
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Concerns of developing nations vs. industrialized countries
Bioprospecting
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