Agriculture 2 The Green Revolution.pptx

Agriculture 2 The Green Revolution.pptx - The Green...

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The Green Revolution “The way we eat has changed more in the last 50 years than in the last 10,000 years”-Michael Pollan, 2009
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Pre-GR Agriculture
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A Word about Seeds Open-pollinated – “natural” pollination by insects, etc. Seeds breed “true”, but may contain genetic diversity. (e.g., heirloom tomatoes). Some species may produce seeds with wide variety if open-pollinated (i.e., squash) F-1 Hybrid – varieties bred for particular traits; created through selective inbreeding of distinctly different varieties of the same species; seeds do not breed true and exhibit trait variability in next generation (e.g., mule) Genetically modified -seeds whose genomes have been altered by inserting genetic material from a different species (e.g., Bt corn)
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Green Revolution
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Green Revolution International effort to improve productivity, starting with corn, wheat and rice, high yield varieties Started around 1960 with an effort to breed and distribute enhanced seeds
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