Origin of Domesticated Plants. Wheat. Most domesticated food plants have been selected for:. large plant parts soft edible tissue thick flesh with intense color fruits attached to tough stems. How much domestication?.
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1. Plants that provide enough calories to meet our basic energy needs. This usually comes from cereal grain or root carbohydrates.
2. We also selected for a balanced nutritional intake - this tends to develop in any system where the cultivator eats and depends upon on what he/she grows.
Vavilov centers – centers of plant diversity and areas of origin for agriculture
kidney beans - Phaseolus vulgaris
lima beans - P. lunatus
Peanuts - Arachis hypogaea
cotton (developed independently from Africa)
chili peppers - Capiscum sp.
Tomatoes - Lycopersicon sp.
Tobacco - Nicotiana tabacum
Cacao - Theobroma cacao
Pineapple - Ananas comosus
Pumpkins, squashes - Cucurbita sp.
Avocados - Persea americanaPlants from Mexico
If the potentially unstable increase in food production and human population is to be maintained, it must be consistent with three aims:
1. To operate at a maximum profit (labor/yield).
2. To minimize year-to-year instability in production.
3. To operate so as to prevent long-term degradation of the production capacity of the agricultural system.
“Although man did not cause variability and cannot even prevent it, he can select, preserve, and accumulate the variations given to him by the hand of nature almost in any way which he chooses; and thus can certainly produce a great result… Selection by man may be followed either methodically and intentionally, or unconsciously and unintentionally… We can further understand how it is that domestic races of plants often exhibit an abnormal character, as compared to natural species, for they have been modified not for their own benefit, but for that of man.”
Domestic High Altitude Another S. sisymbrifolium