Summary

Plant breeding is based on accessing genetic variability and selecting superior plants

Tissue culture methods enable breeders to access a slightly larger gene pool for crop improvement and also play a vital role in transgenic plant production

Genomics methods enable characterization and manipulation of thousands of genes to accellerate crop improvement, but no increase in the size of the gene pool that breeders can use

Transgenic plant methods provide a dramatic increase in the gene pool available for crop improvement

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