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Ancient wheat varieties - einkorn, emmer and spelt are called "hulled wheat" because the hulls are quite tough and not removed during threshing, unlike common and durum wheat, where the hulls are more brittle, and are termed "hulless wheat". Ancient wheat varieties are increasing in popularity, especially with organic farmers, because of their organoleptic qualities. They are collectively called the Italian term "farro". There is a siginificant price differential between hulled and hulless wheat, and hence a requirement to verify labelling of products containing einkorn, emmer and spelt. In this study, researchers have developed a digital PCR method that will quantify the amount of "farro" and hulless wheat (common or durum wheat) in flours and wheat based products. It was tested between two laboratories with a range of products, and apart from two products (which may have been labelling incorrectly), the two laboratories determination matched each other and the labelling very closely. There was no or very little cross reactivity with barley, oat and rice.

Read the full paper here

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