Fingerprinting Tea

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Does this miss the point?

The article’s emphasis on DNA approaches to finger-printing is a little puzzling and I think possibly misses the point. Whilst this gives precise information on a plant’s genotype (i.e. variety or clone), if that variety is grown in multiple locations then it says nothing about geographical origin. For example a Georgian tea variety grown in Georgia and Scotland will come out as identical using this method. Perhaps it depends on the objective of the finger-printing, i.e. whether the focus is on identifying a specific variety vs geographical origin. Some GI protected teas like Long Jing depend on a particular varietal but Darjeeling does not (Darjeeling gardens are full of different varietals and cultivars) so presumably a DNA TEST on Darjeeling teas won’t prove anything?

Beverly Wainwright 8 days ago

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