BIOL 2010 Lecture Notes - Lecture 11: Protoplast, Plant Propagation, Zygosity
2 Dec 2016
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Document Summary
Breeding methods using sexually incompatible germplasm: plant propagation. Crop plant evolution: approximately 250,000 living species of flowering plants, six species provide 80% of calories consumed by humans worldwide. Wheat, rice, corn, potato, sweet potato, and cassava. Crop plant evolution: eight additional plants complete list of major crops grown for human consumption. Sugar cane, sugar beet, bean, soybean, barley, sorghum, coconut, and banana: plants domesticated by altering them genetically. Domesticated plant - reproductive success depends on human intervention. Human selective pressure; changes things to what we want. Something we still do; still alter genetic composition of crops. Origins of agriculture: agricultural practices arose independently in many parts of world, people began to domesticate plants in near east (iran) around 10,000 years ago. Domestication in asia and new world 1,000 to 3,000 years later (didn"t happen at the same time; this is a average estimate: first crops were cereal grains. (geared towards human consumption)
