Spelt

Spelt (''Triticum spelta''), also known as dinkel wheat is a species of wheat. It is a relict crop, eaten in Central Europe and northern Spain. It is high in protein and may be considered a health food.

Spelt was cultivated from the Neolithic period onward. It was a staple food in parts of Europe from the Bronze Age to the Middle Ages. It is used in baking, and is made into bread, pasta, and beer.

It is sometimes considered a subspecies of the closely related common wheat (''T. aestivum''), in which case its botanical name is considered to be ''Triticum aestivum'' subsp. ''spelta''. It is a hexaploid, most likely a hybrid of wheat and emmer.

Description

Spelt is a species of '' Triticum'', a large stout grass similar to bread wheat. Its flowering spike is slenderer than that of bread wheat; when ripe, it bends somewhat from the vertical. The spike is roughly four-edged. The axis of the spike is brittle and divided into segments; it shatters into separate segments when fully ripe. Spelt differs from bread wheat in that each seed (a caryopsis, botanically a fruit with its wall fused to the single seed inside) stays fully encapsulated by its husk.

Confusion with other wheats

Especially in the context of descriptions of ancient cultures, the English word ''spelt'' has sometimes been used for grains that were not ''T. spelta'', but other species of hulled wheat such as ''T. dicoccum'' ( emmer wheat) or ''T. monococcum'' ( einkorn wheat, also known as "little spelt", in French "petit épeautre"). This confusion may arise either from mistranslation of words found in other languages that can denote hulled wheat in general (such as Italian '' farro'', which can denote any of emmer, spelt or einkorn; spelt is sometimes distinguished as , 'large farro', emmer as , ('medium farro'), and einkorn as , 'little farro'), or changing opinions about which actual species of wheat are described in texts written in ancient languages. Thus, the meaning of the ancient Greek word ( eiá or is either uncertain or vague, and has been argued to denote einkorn or emmer rather than spelt. Likewise, the ancient Roman grain denoted by the Latin word ', although often translated as 'spelt', was in fact emmer. Similarly, references to the cultivation of spelt wheat in Biblical times in ancient Egypt and Mesopotamia are incorrect: they result from confusion with emmer wheat.

Evolution

Hybridisation and polyploidy

Like common wheat, spelt is a hexaploid wheat species, which means it has six sets of chromosomes. It is derived from a hybridisation event between a domesticated tetraploid wheat such as durum wheat and another wheat species, increasing the number of sets of chromosomes. Genetic evidence indicates an initial hybridisation of a domesticated tetraploid wheat and the diploid wild goat-grass '' Aegilops tauschii''. It further shows that spelt could have arisen as the result of a second hybridisation, this time of bread wheat and emmer wheat, giving rise to European spelt. The spelt genome continues to influence the breeding of modern hexaploid bread wheat through recent hybridisation.

Spelt, being closely related to bread wheat, is a likely source of alleles to increase wheat's genetic diversity, and so improve crop yields. Analysis of the Oberkulmer cultivar of spelt found 40 alleles that could contribute to increased yield. Among the differences were spelt's larger grain size, greater fertility of tillers, and longer fruiting spikes. ' is an effector-triggered resistance gene for powdery mildew.

History of cultivation

Spelt has been cultivated since approximately 5000 BCE. In the fifth millennium BCE, there are archaeological remains in the north of Iraq and in Transcaucasia, north-east of the Black Sea. Much more evidence comes from Europe. Remains of spelt have been found in Denmark, Germany, and Poland from the later Neolithic (dating from 2500–1700 BCE). Evidence of spelt has been found from across central Europe from the Bronze Age. In the south of Germany and Switzerland in the Iron Age (750–15 BCE), it was a major type of wheat, while by 500 BCE, it had in addition become widespread in the south of Britain. There is evidence that spelt cultivation increased in Iron Age Britain as damp regions of the country with heavy soils tolerated by spelt were being settled.

In the Middle Ages, spelt was cultivated in parts of Switzerland, Tyrol, Germany, northern France and the southern Low Countries. Spelt became a major crop in Europe in the 9th century CE, possibly because it is more suitable for storage and being husked makes it more adaptable to cold climates.

Spelt was introduced to the United States in the 1890s. In the 20th century, spelt was replaced by bread wheat in almost all areas where it was still grown. The organic farming movement revived its popularity somewhat toward the end of the 20th century, as spelt requires less fertilizer. Since the beginning of the 21st century, spelt has become a common wheat substitute for making artisanal loaves of bread, pasta, and flakes. By 2014, the grain was popular in the UK, Kazakhstan, and Ukraine. Shortages were reported although spelt was grown in those countries. In the United States, most spelt is grown in Ohio as of 2022.

Nutrition

A reference serving of uncooked spelt provides of food energy and is a rich source (20% or more of the Daily Value) of protein, dietary fiber, several B vitamins, and numerous dietary minerals (table). Highest nutrient contents include manganese (143% DV), phosphorus (57% DV), and niacin (46% DV). Spelt contains about 70% total carbohydrates, including 11% as dietary fibre, and is low in fat (table).

Spelt contains gluten, and is therefore suitable for baking, but this component makes it unsuitable for people with gluten-related disorders, such as celiac disease.
In comparison to hard red winter wheat, spelt has a more soluble protein matrix characterized by a higher gliadin: glutenin ratio.

Products

In Germany and Austria, spelt loaves and rolls (''dinkelbrot'') are widely available in bakeries. The unripe spelt grains are dried and eaten as '' grünkern'' ("green grain"). In some countries, spelt may be considered a health food; for example, in Australia it is grown organically for the health food market. Dutch ''jenever'' makers sometimes distil with spelt, while beer brewed from spelt exists in Bavaria and Belgium.

File:05215 Spelt bread, Sanok.JPG, Wholegrain spelt bread from Poland

See also

* Khorasan wheat
* Sorghum bicolor

References

External links

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{{Authority control

Plants described in 1753
Wheat
Wheat cultivars