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Farro is made from any of three species of hulled wheat (those that retain their husks tightly and cannot be threshed): spelt (Triticum spelta), emmer (Triticum dicoccum), and einkorn (Triticum monococcum). [3] In Italian cuisine, the three species are sometimes distinguished as farro grande, farro medio, and farro piccolo. [4]
The principal difference between wild einkorn and cultivated einkorn is the method of seed dispersal. In the wild variety the seed head usually shatters and drops the kernels (seeds) of wheat onto the ground. [1] This facilitates a new crop of wheat. In the domestic variety, the seed head remains intact.
Thus, the meaning of the ancient Greek word ζειά ([zeiá]) or ζέα is either uncertain or vague, and has been argued to denote einkorn [6] or emmer rather than spelt. [7] Likewise, the ancient Roman grain denoted by the Latin word far , although often translated as 'spelt', was in fact emmer. [ 8 ]
Like einkorn (T. monococcum) and spelt (T. spelta), emmer is a hulled wheat, meaning it has strong glumes (husks) that enclose the grains, and a semibrittle rachis. On threshing, a hulled wheat spike breaks up into spikelets that require milling or pounding to release the grains from the glumes. [ 7 ]
Hexaploid wheats (e.g. T. aestivum – the most common – and T. spelta) are the result of a hybridisation between a domesticated tetraploid wheat, probably T. dicoccum or T. durum, and another goatgrass, Ae. tauschii or Ae. squarrosa. [6] [8] The hexaploid genome is an allohexaploid composed of two copies each of three subgenomes, AABBDD. [9]
Hulled wheat and einkorn. Note how the einkorn ear breaks down into intact spikelets. The wild species of wheat, along with the domesticated varieties einkorn, [70] emmer [71] and spelt, [72] have hulls. This more primitive morphology (in evolutionary terms) consists of toughened glumes that tightly enclose the grains, and (in domesticated ...
Wild emmer arose from an even earlier ploidy event, a tetraploidy between two diploids, wild einkorn (T. urartu) and A. speltoides (another wild goatgrass). [9] [6] [10] [11] [12] Free-threshing wheat is closely related to spelt.
Modern wheat is a hybrid descendant of three wheat species considered to be ancient grains: spelt, einkorn, and emmer. [6] [7] Historical importance.
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