Cocoa beans' varietal purity and place of origin can be determined through genetic markers extracted from the skin, according to American Chemical Society’s Journal of Agricultural and Food Chemistry. Cocoa beans, which are seeds, carry the DNA of the parent tree, and researchers were able to isolate the genetic footprint in a seed's coat and trace it back to the parent tree. The test also enables a large number of samples to be processed in a short amount of time with greater accuracy than previous testing methods, and could also act as a tool to economically reward growers who work with seeds that are harder to grow.

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