Origins of Cultivated Plants Chapter 2. Why were plants domesticated? Steady food source. Higher TDN...
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Transcript of Origins of Cultivated Plants Chapter 2. Why were plants domesticated? Steady food source. Higher TDN...
![Page 1: Origins of Cultivated Plants Chapter 2. Why were plants domesticated? Steady food source. Higher TDN Storage Steady food source. Higher TDN Storage.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54ec5/html5/thumbnails/1.jpg)
Origins of Cultivated Origins of Cultivated PlantsPlants
Chapter 2
![Page 2: Origins of Cultivated Plants Chapter 2. Why were plants domesticated? Steady food source. Higher TDN Storage Steady food source. Higher TDN Storage.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54ec5/html5/thumbnails/2.jpg)
Why were plants domesticated?Why were plants domesticated?
• Steady food source.
• Higher TDN
• Storage
• Steady food source.
• Higher TDN
• Storage
![Page 3: Origins of Cultivated Plants Chapter 2. Why were plants domesticated? Steady food source. Higher TDN Storage Steady food source. Higher TDN Storage.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54ec5/html5/thumbnails/3.jpg)
Methods of DomesticationMethods of Domestication
• Seed or sexual propagation• Cereal grain among the first• Shattering Vs non-shattering types• Plant close together• Seed dormancy• Selection pressures
• Seed or sexual propagation• Cereal grain among the first• Shattering Vs non-shattering types• Plant close together• Seed dormancy• Selection pressures
![Page 4: Origins of Cultivated Plants Chapter 2. Why were plants domesticated? Steady food source. Higher TDN Storage Steady food source. Higher TDN Storage.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54ec5/html5/thumbnails/4.jpg)
Two main RegionsTwo main Regions
• Old World = Asia and Asia Minor– Fertile Crescent = eastern end of the
Mediterranean Sea and Central Asia
• New World = Central Mexico to Chile
• Old World = Asia and Asia Minor– Fertile Crescent = eastern end of the
Mediterranean Sea and Central Asia
• New World = Central Mexico to Chile
![Page 5: Origins of Cultivated Plants Chapter 2. Why were plants domesticated? Steady food source. Higher TDN Storage Steady food source. Higher TDN Storage.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54ec5/html5/thumbnails/5.jpg)
Domestication of PlantsDomestication of Plants
• 8000 – 9000 B.C. evidence of agricultural villages.
• Radio carbon dating suggests 5000 – 6000 B.C.
• Africa – 4000 B.C.• Chinese 4000 B.C.
• 8000 – 9000 B.C. evidence of agricultural villages.
• Radio carbon dating suggests 5000 – 6000 B.C.
• Africa – 4000 B.C.• Chinese 4000 B.C.
![Page 6: Origins of Cultivated Plants Chapter 2. Why were plants domesticated? Steady food source. Higher TDN Storage Steady food source. Higher TDN Storage.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54ec5/html5/thumbnails/6.jpg)
New Crops and New UsesNew Crops and New Uses
• American farmers produce highest yields in the world.
• Develop new crops and new markets
• American farmers produce highest yields in the world.
• Develop new crops and new markets
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The Big FourThe Big Four
• Rice
• Wheat
• Corn
• Potatoes
• Rice
• Wheat
• Corn
• Potatoes
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RiceRice
• Feeds over half of the world
• There are 25 species
• Mutations and hybrid response for improvements
• Short, medium and long
• Feeds over half of the world
• There are 25 species
• Mutations and hybrid response for improvements
• Short, medium and long
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WheatWheat
• White & Red
• Hybrids has increased vigor
• Hard to increase yields because of self pollination
• White & Red
• Hybrids has increased vigor
• Hard to increase yields because of self pollination
![Page 10: Origins of Cultivated Plants Chapter 2. Why were plants domesticated? Steady food source. Higher TDN Storage Steady food source. Higher TDN Storage.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c54ec5/html5/thumbnails/10.jpg)
CornCorn
• Cultures based on corn
• Corn mutates easily
• Important for its color size and shape
• Hybrid corn in 1930’s
• Cultures based on corn
• Corn mutates easily
• Important for its color size and shape
• Hybrid corn in 1930’s
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PotatoPotato
• When planted from seed much different from parents
• Selection/tuber division
• Seed “tubers”
• When planted from seed much different from parents
• Selection/tuber division
• Seed “tubers”
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Hatch Act of 1887Hatch Act of 1887
• Experiment stations at each of the land-grand colleges.
• Davis & Berkley
• Experiment stations at each of the land-grand colleges.
• Davis & Berkley
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SurplusSurplus
• Marketing Plans
• Produce the think about selling.
• Marketing Plans
• Produce the think about selling.
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Germ PlasmGerm Plasm
• Introduction-new plant materials
• Maintenance-banks and collections
• Evaluation- screening and tests
• Distribution-made free of charge to scientists
• Introduction-new plant materials
• Maintenance-banks and collections
• Evaluation- screening and tests
• Distribution-made free of charge to scientists
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Why Protect our germ plasmWhy Protect our germ plasm