|Author: ||J. Janick|
The development of agriculture from Neolithic to the modern era is characterized by continued exchanges of crops and genes such that the centers of origin of most crops have become distinct from their centers of production.
This trend continued unabated in the twentieth century.
The creation of new fruits from the exploitation of unique genotypes of once-gathered crops (avocado, blueberry, kiwifruit, macadamia) is the glory of twentieth-century horticulture.
The synthesis of new crop species from interspecific crosses is a recent achievement of the plant breeder's art.
The resurrection of crop remnants from lost and old civilizations is presently underway.
Recent interest has focused on altering established crops by a combination of conventional and unconventional techniques to add "value-added" genes, transforming old crops to new crops.
As we look forward to the twenty-first century we search for the optimum strategies between these competing protocols in order to increase diversity and maintain the sustainability of agricultural production in an increasingly crowded planet.
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