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Selective Breeding of Crops

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Liana B

on 21 October 2014

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Transcript of Selective Breeding of Crops

Selective Breeding vs. Chemicals
Selective breeding decreases the need for chemicals in the fields.
About 25% of global food crops are lost to insects each year.
Selective Breeding and Crop Yield
Selective breeding allows farmers to obtain a greater crop yield.
Domesticated crops have often been selectively bred to produce a greater crop yield.
Works Cited
Selective Breeding of Crops
Question: How has selective breeding of specific crops helped to increase the yield of the crop and decrease the need for chemicals in the fields?
What will be discussed:
What is selective breeding?
Advantages and disadvantages of selective breeding
How is selective breeding used to increase crop yield?
How does selective breeding decrease the need for chemicals in the fields?
Selective Breeding
Selective breeding, also called artificial selection, is the unnatural selection of plants with more desirable traits to produce plants with better quality and higher yield
Advantages and disadvantages
The evolution of maize cob over thousands of years.
The progression of maize cobs due to artificial selection
Yellow vein mosaic disease causes the edible portion of the okra plant appear small and yellow.
Leaves of the okra plant turn yellow as a result of yellow vein mosaic disease.
Okra plant, bred with hibiscus to form a hybrid species
Healthy okra
Bacillus thuringiensis
under a microscope
Mature larva of a European corn borer
Selective breeding helps to increase the yield of the crop and decrease the need for chemicals in the fields.
Our Opinion on Selective Breeding
We believe that selective breeding is good, as the advantages outweigh the disadvantages
Selective Breeding and Evolution
Artificial selection = lower genetic diversity
Bottle neck effect
Bottleneck effect
Full transcript